BlackTreeCVE Intelligence
← Back to the CVE catalogue
Full vulnerability report · 2026
CVE-2026-27135High confidence

nghttp2 Denial of service: Assertion failure due to the missing state validation

nghttp2 · nghttp2

Official source article: GitHub GHSA-6933-CJHR-5QG6 ↗. Check the applicable product and release in the original source.

7.5HighCVSS 3.1
Recommended action
Patch only the product branches with a verified fix

High technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 5 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:High, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 0.89% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs nghttp2 nghttp2 and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 30 daysRemediation target: Within 180 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 5 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Distribution package intelligence

Release-specific package status

Alpine, Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

8 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Alpine v3.23v3.23 · mainnghttp2Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.68.1Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.22v3.22 · mainnghttp2Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.68.1Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.21v3.21 · mainnghttp2Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.68.1Alpine Security Database ↗Source updated 3 Oct 2026
Debian trixietrixie · sourcenghttp2Vendor fix publishedDebian records a fixed source-package version for this release.1.64.0-1.1+deb13u1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian bookwormbookworm · sourcenghttp2Vendor fix publishedDebian records a fixed source-package version for this release.1.52.0-1+deb12u3Debian Security Tracker ↗Source updated 6 Oct 2026
Debian forkyforky · sourcenghttp2Vendor fix publishedDebian records a fixed source-package version for this release.1.68.1-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian sidsid · sourcenghttp2Vendor fix publishedDebian records a fixed source-package version for this release.1.68.1-1Debian Security Tracker ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivenghttp2Vendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.1.59.0-1ubuntu0.3Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

3 current
CVE-2026-27135 · CSAF 2.0 · revision 57 · interimSUSE Product Security TeamCVE-2026-27135
727 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • cargo1.88 as component of SUSE Linux Enterprise Desktop 15 SP7
  • cargo1.89 as component of SUSE Linux Enterprise Desktop 15 SP7
  • cargo1.90 as component of SUSE Linux Enterprise Desktop 15 SP7
  • cargo1.91 as component of SUSE Linux Enterprise Desktop 15 SP7
  • cargo1.92 as component of SUSE Linux Enterprise Desktop 15 SP7
  • cargo1.93 as component of SUSE Linux Enterprise Desktop 15 SP7
  • cargo1.94 as component of SUSE Linux Enterprise Desktop 15 SP7
  • rust1.88 as component of SUSE Linux Enterprise Desktop 15 SP7
  • rust1.88-src as component of SUSE Linux Enterprise Desktop 15 SP7
  • rust1.89 as component of SUSE Linux Enterprise Desktop 15 SP7
  • rust1.89-src as component of SUSE Linux Enterprise Desktop 15 SP7
  • rust1.90 as component of SUSE Linux Enterprise Desktop 15 SP7
Summary
nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.
Remediation
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
CVE-2026-27135 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitynghttp2: nghttp2: Denial of Service via malformed HTTP/2 frames after session termination
1 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4
Summary
A flaw was found in nghttp2. Due to missing internal state validation, the library continues to process incoming data even after a session has been terminated. A remote attacker could exploit this by sending a specially crafted HTTP/2 frame, leading to an assertion failure and a denial of service (DoS).
Remediation
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
SSA-019113 · CSAF 2.0 · revision 2 · interimSiemens ProductCERTSSA-019113: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.6
5 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= V3.1.6
  • SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= V3.1.6
  • SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= V3.1.6
  • SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= V3.1.6
  • SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= V3.1.6
Summary
nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.
Remediation
Limit access to the interactive shell of the additional GNU/Linux subssytem to trusted personnel only.
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-12919

No EUVD known-exploited evidence

nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
7.5 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionPatch only the product branches with a verified fix

High technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 5 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.

What

nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.

Why

The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.

Why

The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Reachable Assertion → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-617 ↗

CWE-617: Reachable Assertion. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-617
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-12919Official EUVD mapping

nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.

Official EUVD record ↗
BSI · German · WID-SEC-2026-2437Oracle Communications: Mehrere Schwachstellen

Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle Communications ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.

Official advisory ↗
BSI · German · WID-SEC-2026-2253IBM Security Verify Access: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in IBM Security Verify Access ausnutzen, um erweiterte Berechtigungen zu erlangen, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, sensible Informationen offenzulegen und andere, nicht näher bezeichnete Angriffe durchzuführen.

Official advisory ↗
BSI · German · WID-SEC-2026-1666IBM QRadar SIEM: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in IBM QRadar SIEM ausnutzen, um beliebigen Programmcode auszuführen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, und um Sicherheitsvorkehrungen zu umgehen.

Official advisory ↗
BSI · German · WID-SEC-2026-0775nghttp2: Schwachstelle ermöglicht Denial of Service

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in nghttp2 ausnutzen, um einen Denial of Service Angriff durchzuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260325Security Bulletin 25 Mar 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 25 Mar 2026, published on 25 March 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0880Multiples vulnérabilités dans les produits Siemens

26-23277, CVE-2026-23284, CVE-2026-23287, CVE-2026-23290, CVE-2026-23293, CVE-2026-23300, CVE-2026-23304, CVE-2026-23319, CVE-2026-23321, CVE-2026-23335, CVE-2026-23340, CVE-2026-23343, CVE-2026-23351, CVE-2026-23359, CVE-2026-23365, CVE-2026-23368, CVE-2026-23370, CVE-2026-23378, CVE-2026-23379, CVE-2026-23381, CVE-2026-23391, CVE-2026-23392, CVE-2026-23397, CVE-2026-23398, CVE-2026-23414, CVE-2026-23422, CVE-2026-23434, CVE-2026-23438, CVE-2026-23439, CVE-2026-23446, CVE-2026-23449, CVE-2026-23450, CVE-2026-23452, CVE-2026-23454, CVE-2026-23455, CVE-2026-23456, CVE-2026-23457, CVE-2026-23458, CVE-2026-23463, CVE-2026-23474, CVE-2026-23475, CVE-2026-27135, CVE-2026-31389, CVE-2026-31391, CVE-2026-31396, CVE-2026-31402, CVE-2026-31403, CVE-2026-31411, CVE-2026-31414, CVE-2026-31415, CVE-2026-31416, CVE-2026-31417, CVE-2026-31418, CVE-2026-31421, CVE-2026-31422, CVE-2026-31423, CVE-2026-31424, CVE-2026-31427, CVE-2026-31428, CVE-2026-31431, CVE-2026-31441, CVE-2026-31446, CVE-2026-31447, CVE-2026-31448, CVE-2026-31450, CVE-2026-31452, CVE-2026-31466, CVE-2026-31469, CVE-2026-31485, CVE-2026-31494, CVE-2026-31495, CVE-2026-31496, CVE-2026-31503, CVE-2026-31504, CVE-2026-31507, CVE-2026-31508, CVE-2026-31515, CVE-2026-31518, CVE-2026-31521, CVE-2026-31533, CVE-2026-31546, CVE-2026-31555, CVE-2026

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0667Multiples vulnérabilités dans les produits IBM

ord?id=CVE-2026-24842 Référence CVE CVE-2026-25128 https://www.cve.org/CVERecord?id=CVE-2026-25128 Référence CVE CVE-2026-25547 https://www.cve.org/CVERecord?id=CVE-2026-25547 Référence CVE CVE-2026-25639 https://www.cve.org/CVERecord?id=CVE-2026-25639 Référence CVE CVE-2026-2581 https://www.cve.org/CVERecord?id=CVE-2026-2581 Référence CVE CVE-2026-25896 https://www.cve.org/CVERecord?id=CVE-2026-25896 Référence CVE CVE-2026-26278 https://www.cve.org/CVERecord?id=CVE-2026-26278 Référence CVE CVE-2026-26960 https://www.cve.org/CVERecord?id=CVE-2026-26960 Référence CVE CVE-2026-26996 https://www.cve.org/CVERecord?id=CVE-2026-26996 Référence CVE CVE-2026-27135 https://www.cve.org/CVERecord?id=CVE-2026-27135 Référence CVE CVE-2026-27199 https://www.cve.org/CVERecord?id=CVE-2026-27199 Référence CVE CVE-2026-2739 https://www.cve.org/CVERecord?id=CVE-2026-2739 Référence CVE CVE-2026-27448 https://www.cve.org/CVERecord?id=CVE-2026-27448 Référence CVE CVE-2026-27459 https://www.cve.org/CVERecord?id=CVE-2026-27459 Référence CVE CVE-2026-27699 https://www.cve.org/CVERecord?id=CVE-2026-27699 Référence CVE CVE-2026-27837 https://www.cve.org/CVERecord?id=CVE-2026-27837 Référence CVE CVE-2026-27903 https://www.cve.org/CVERecord?id=CVE-2026-27903 Référence CVE CVE-2026-27904 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0556Multiples vulnérabilités dans les produits VMware

d?id=CVE-2026-24049 Référence CVE CVE-2026-24051 https://www.cve.org/CVERecord?id=CVE-2026-24051 Référence CVE CVE-2026-24281 https://www.cve.org/CVERecord?id=CVE-2026-24281 Référence CVE CVE-2026-24308 https://www.cve.org/CVERecord?id=CVE-2026-24308 Référence CVE CVE-2026-24880 https://www.cve.org/CVERecord?id=CVE-2026-24880 Référence CVE CVE-2026-25645 https://www.cve.org/CVERecord?id=CVE-2026-25645 Référence CVE CVE-2026-25679 https://www.cve.org/CVERecord?id=CVE-2026-25679 Référence CVE CVE-2026-25854 https://www.cve.org/CVERecord?id=CVE-2026-25854 Référence CVE CVE-2026-25990 https://www.cve.org/CVERecord?id=CVE-2026-25990 Référence CVE CVE-2026-27135 https://www.cve.org/CVERecord?id=CVE-2026-27135 Référence CVE CVE-2026-27139 https://www.cve.org/CVERecord?id=CVE-2026-27139 Référence CVE CVE-2026-27140 https://www.cve.org/CVERecord?id=CVE-2026-27140 Référence CVE CVE-2026-27141 https://www.cve.org/CVERecord?id=CVE-2026-27141 Référence CVE CVE-2026-27142 https://www.cve.org/CVERecord?id=CVE-2026-27142 Référence CVE CVE-2026-27143 https://www.cve.org/CVERecord?id=CVE-2026-27143 Référence CVE CVE-2026-27144 https://www.cve.org/CVERecord?id=CVE-2026-27144 Référence CVE CVE-2026-27199 https://www.cve.org/CVERecord?id=CVE-2026-27199 Référence CVE CVE-2026-27205 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0341Multiples vulnérabilités dans les produits Microsoft

De multiples vulnérabilités ont été découvertes dans les produits Microsoft. Elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-008565nghttp2 projectのnghttp2における到達可能なアサーションに関する脆弱性

nghttp2はC言語で実装されたHypertext Transfer Protocol version 2の実装です。バージョン1.68.1以前では、ユーザーが利用する公開APIである`nghttp2_session_terminate_session`または`nghttp2_session_terminate_session2`がアプリケーションから呼び出されると、nghttp2ライブラリは受信データの読み取りを停止します。これらのAPIは、接続エラーにつながる状況をライブラリが検出した際に内部的に呼び出されることもあります。内部状態の検証が欠落していたため、これらのAPIのいずれかが呼び出された後もライブラリはデータの読み取りを続けてしまいます。その結果、FRAME_SIZE_ERRORを引き起こす不正なフレームを受信するとアサーション失敗が発生します。nghttp2 v1.68.1では、アサーション失敗を回避するために欠落していた状態検証が追加されました。既知の回避策は存在しません。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix availability varies by product
Affected
Fixed
RHSA-2026:27200: Red Hat JBoss Core Services on RHEL 7 Server, Red Hat JBoss Core Services on RHEL 8
Action
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 18 Mar 2026 · Last source change 8 Sept 2026, 08:46 UTC · CWE-617 · Reachable Assertion

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-12919
Product sourceVendor CSAF · SUSE Product Security Team
Remediation sourceVendor CSAF · SUSE Product Security Team
CWE sourceCNA
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4 · Fixed: jbcs-httpd24-nghttp2-0:1.64.0-3.el7jbcs.src as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-0:1.64.0-3.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-debuginfo-0:1.64.0-3.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-devel-0:1.64.0-3.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-0:1.64.0-3.el8jbcs.src as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-nghttp2-0:1.64.0-3.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-nghttp2-debuginfo-0:1.64.0-3.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-nghttp2-devel-0:1.64.0-3.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; rhcos-x86_64-412.86.202605271418-0 as a component of Red Hat OpenShift Container Platform 4.12; rhpam-7/rhpam-businesscentral-monitoring-rhel8@sha256:92df715c896f06f6aa93b631bd62e3a146bad3cd08666cbab955d5cccdad0ea0_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-businesscentral-rhel8@sha256:23b2eace9e0e381d6a8db37a11ebef3a092f7b14352b3a05187c7b9e78f6e60e_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-controller-rhel8@sha256:6a8c527be5f7140866dca164d60ab484d40f28281becd849907f8740a8a2a87d_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-dashbuilder-rhel8@sha256:64efe627bd982759b2492ca8bf4d31315c68bf0262c0ca448a93335a11c81673_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-kieserver-rhel8@sha256:56ce30c3d224f65df05b066f39741797836687b4aeab7d7269bf5d28f45dc04d_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-process-migration-rhel8@sha256:a4a34e29ddb6f9d60e64f19bac7fe49eb0b66fcbb6803cbc6563b77e7d7f9904_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-smartrouter-rhel8@sha256:14df06eab56c17b7f718884c7379098ec3842ed99d6c5778dc2810ac9b1d4c17_amd64 as a component of Middleware Containers for OpenShift; rhcos-x86_64-413.92.202605271328-0 as a component of Red Hat OpenShift Container Platform 4.13; rhcos-aarch64-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-ppc64le-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-s390x-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-x86_64-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-aarch64-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-ppc64le-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-s390x-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-x86_64-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-aarch64-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-ppc64le-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-s390x-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-x86_64-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-aarch64-417.94.202605112123-0 as a component of Red Hat OpenShift Container Platform 4.17; and 889 more
    After
    openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4 · Fixed: jbcs-httpd24-nghttp2-0:1.64.0-3.el7jbcs.src as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-0:1.64.0-3.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-debuginfo-0:1.64.0-3.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-devel-0:1.64.0-3.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-0:1.64.0-3.el8jbcs.src as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-nghttp2-0:1.64.0-3.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-nghttp2-debuginfo-0:1.64.0-3.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-nghttp2-devel-0:1.64.0-3.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; rhcos-x86_64-412.86.202605271418-0 as a component of Red Hat OpenShift Container Platform 4.12; rhpam-7/rhpam-businesscentral-monitoring-rhel8@sha256:92df715c896f06f6aa93b631bd62e3a146bad3cd08666cbab955d5cccdad0ea0_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-businesscentral-rhel8@sha256:23b2eace9e0e381d6a8db37a11ebef3a092f7b14352b3a05187c7b9e78f6e60e_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-controller-rhel8@sha256:6a8c527be5f7140866dca164d60ab484d40f28281becd849907f8740a8a2a87d_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-dashbuilder-rhel8@sha256:64efe627bd982759b2492ca8bf4d31315c68bf0262c0ca448a93335a11c81673_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-kieserver-rhel8@sha256:56ce30c3d224f65df05b066f39741797836687b4aeab7d7269bf5d28f45dc04d_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-process-migration-rhel8@sha256:a4a34e29ddb6f9d60e64f19bac7fe49eb0b66fcbb6803cbc6563b77e7d7f9904_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-smartrouter-rhel8@sha256:14df06eab56c17b7f718884c7379098ec3842ed99d6c5778dc2810ac9b1d4c17_amd64 as a component of Middleware Containers for OpenShift; rhcos-x86_64-413.92.202605271328-0 as a component of Red Hat OpenShift Container Platform 4.13; rhcos-aarch64-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-ppc64le-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-s390x-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-x86_64-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-aarch64-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-ppc64le-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-s390x-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-x86_64-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-aarch64-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-ppc64le-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-s390x-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-x86_64-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-aarch64-417.94.202605112123-0 as a component of Red Hat OpenShift Container Platform 4.17; and 888 more
    Red Hat Product Security ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    Fixed: jbcs-httpd24-nghttp2-0:1.64.0-3.el7jbcs.src as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-0:1.64.0-3.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-debuginfo-0:1.64.0-3.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-devel-0:1.64.0-3.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-0:1.64.0-3.el8jbcs.src as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-nghttp2-0:1.64.0-3.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-nghttp2-debuginfo-0:1.64.0-3.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-nghttp2-devel-0:1.64.0-3.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; rhcos-x86_64-412.86.202605271418-0 as a component of Red Hat OpenShift Container Platform 4.12; rhpam-7/rhpam-businesscentral-monitoring-rhel8@sha256:92df715c896f06f6aa93b631bd62e3a146bad3cd08666cbab955d5cccdad0ea0_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-businesscentral-rhel8@sha256:23b2eace9e0e381d6a8db37a11ebef3a092f7b14352b3a05187c7b9e78f6e60e_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-controller-rhel8@sha256:6a8c527be5f7140866dca164d60ab484d40f28281becd849907f8740a8a2a87d_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-dashbuilder-rhel8@sha256:64efe627bd982759b2492ca8bf4d31315c68bf0262c0ca448a93335a11c81673_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-kieserver-rhel8@sha256:56ce30c3d224f65df05b066f39741797836687b4aeab7d7269bf5d28f45dc04d_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-process-migration-rhel8@sha256:a4a34e29ddb6f9d60e64f19bac7fe49eb0b66fcbb6803cbc6563b77e7d7f9904_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-smartrouter-rhel8@sha256:14df06eab56c17b7f718884c7379098ec3842ed99d6c5778dc2810ac9b1d4c17_amd64 as a component of Middleware Containers for OpenShift; rhcos-x86_64-413.92.202605271328-0 as a component of Red Hat OpenShift Container Platform 4.13; rhcos-aarch64-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-ppc64le-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-s390x-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-x86_64-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-aarch64-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-ppc64le-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-s390x-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-x86_64-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-aarch64-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-ppc64le-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-s390x-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-x86_64-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-aarch64-417.94.202605112123-0 as a component of Red Hat OpenShift Container Platform 4.17; and 889 more
    After
    openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4 · Fixed: jbcs-httpd24-nghttp2-0:1.64.0-3.el7jbcs.src as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-0:1.64.0-3.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-debuginfo-0:1.64.0-3.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-devel-0:1.64.0-3.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-nghttp2-0:1.64.0-3.el8jbcs.src as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-nghttp2-0:1.64.0-3.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-nghttp2-debuginfo-0:1.64.0-3.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-nghttp2-devel-0:1.64.0-3.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; rhcos-x86_64-412.86.202605271418-0 as a component of Red Hat OpenShift Container Platform 4.12; rhpam-7/rhpam-businesscentral-monitoring-rhel8@sha256:92df715c896f06f6aa93b631bd62e3a146bad3cd08666cbab955d5cccdad0ea0_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-businesscentral-rhel8@sha256:23b2eace9e0e381d6a8db37a11ebef3a092f7b14352b3a05187c7b9e78f6e60e_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-controller-rhel8@sha256:6a8c527be5f7140866dca164d60ab484d40f28281becd849907f8740a8a2a87d_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-dashbuilder-rhel8@sha256:64efe627bd982759b2492ca8bf4d31315c68bf0262c0ca448a93335a11c81673_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-kieserver-rhel8@sha256:56ce30c3d224f65df05b066f39741797836687b4aeab7d7269bf5d28f45dc04d_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-process-migration-rhel8@sha256:a4a34e29ddb6f9d60e64f19bac7fe49eb0b66fcbb6803cbc6563b77e7d7f9904_amd64 as a component of Middleware Containers for OpenShift; rhpam-7/rhpam-smartrouter-rhel8@sha256:14df06eab56c17b7f718884c7379098ec3842ed99d6c5778dc2810ac9b1d4c17_amd64 as a component of Middleware Containers for OpenShift; rhcos-x86_64-413.92.202605271328-0 as a component of Red Hat OpenShift Container Platform 4.13; rhcos-aarch64-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-ppc64le-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-s390x-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-x86_64-414.92.202605060243-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-aarch64-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-ppc64le-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-s390x-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-x86_64-415.92.202605060220-0 as a component of Red Hat OpenShift Container Platform 4.15; rhcos-aarch64-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-ppc64le-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-s390x-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-x86_64-416.94.202605200242-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-aarch64-417.94.202605112123-0 as a component of Red Hat OpenShift Container Platform 4.17; and 889 more
    Red Hat Product Security ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    < 1.68.1 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    After
    nghttp2: < 1.68.1 · Fixed: RHSA-2026:27200: Red Hat JBoss Core Services on RHEL 7 Server, Red Hat JBoss Core Services on RHEL 8
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2026-12919↗Vendor CSAF · SUSE Product Security Team↗CVE authority or vendor reference · GitHub GHSA-6933-CJHR-5QG6↗Patch or update reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-27135 · cve.blacktree.nl