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Full vulnerability report · 2026
CVE-2026-49975High confidence

Apache HTTP Server: mod_http2 denial of service

Apache Software Foundation · Apache HTTP Server

7.5HighCVSS 3.1
Recommended action
Within 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:Critical, raised one band.upgradedsince 19 Aug 2026

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 4.17% 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.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Apache Software Foundation Apache HTTP Server 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 3 daysRemediation target: Within 90 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.

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.

12 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 · mainapache2Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.2.4.68-r0Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.23v3.23 · mainnginxVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.28.3-r3Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.22v3.22 · mainapache2Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.2.4.68-r0Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.22v3.22 · mainnginxVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.28.3-r3Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.21v3.21 · mainapache2Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.2.4.68-r0Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.21v3.21 · mainnginxVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.26.3-r1Alpine Security Database ↗Source updated 3 Oct 2026
Debian trixietrixie · sourceapache2Vendor fix publishedDebian records a fixed source-package version for this release.2.4.67-1~deb13u3Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourceapache2Vendor fix publishedDebian records a fixed source-package version for this release.2.4.67-1~deb12u3Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourceapache2Vendor fix publishedDebian records a fixed source-package version for this release.2.4.67-2Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourceapache2Vendor fix publishedDebian records a fixed source-package version for this release.2.4.67-2Debian Security Tracker ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archiveapache2Vendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.2.4.58-1ubuntu8.13Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivenginxVendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.1.24.0-2ubuntu7.12Canonical 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.

2 current
CVE-2026-49975 · CSAF 2.0 · revision 16 · interimSUSE Product Security TeamCVE-2026-49975
111 known affected

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

  • apache2 as component of SUSE Linux Enterprise High Performance Computing 12 SP4
  • apache2-doc as component of SUSE Linux Enterprise High Performance Computing 12 SP4
  • apache2-example-pages as component of SUSE Linux Enterprise High Performance Computing 12 SP4
  • apache2-prefork as component of SUSE Linux Enterprise High Performance Computing 12 SP4
  • apache2-utils as component of SUSE Linux Enterprise High Performance Computing 12 SP4
  • apache2-worker as component of SUSE Linux Enterprise High Performance Computing 12 SP4
  • apache2 as component of SUSE Linux Enterprise High Performance Computing 15 SP1
  • apache2-devel as component of SUSE Linux Enterprise High Performance Computing 15 SP1
  • apache2-doc as component of SUSE Linux Enterprise High Performance Computing 15 SP1
  • apache2-prefork as component of SUSE Linux Enterprise High Performance Computing 15 SP1
  • apache2-utils as component of SUSE Linux Enterprise High Performance Computing 15 SP1
  • apache2-worker as component of SUSE Linux Enterprise High Performance Computing 15 SP1
Summary
Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.
Remediation
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
CVE-2026-49975 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityhttpd: httpd: HTTP/2 Remote Denial of Service via compression bomb and Slowloris-style attack
342 fixed

The vendor explicitly identifies these products or versions as containing the fix.

  • jbcs-httpd24-httpd-0:2.4.62-13.el7jbcs.src as a component of Red Hat JBoss Core Services on RHEL 7 Server
  • jbcs-httpd24-httpd-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server
  • jbcs-httpd24-httpd-debuginfo-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server
  • jbcs-httpd24-httpd-devel-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server
  • jbcs-httpd24-httpd-manual-0:2.4.62-13.el7jbcs.noarch as a component of Red Hat JBoss Core Services on RHEL 7 Server
  • jbcs-httpd24-httpd-selinux-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server
  • jbcs-httpd24-httpd-tools-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server
  • jbcs-httpd24-mod_http2-0:2.0.29-10.el7jbcs.src as a component of Red Hat JBoss Core Services on RHEL 7 Server
  • jbcs-httpd24-mod_http2-0:2.0.29-10.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server
  • jbcs-httpd24-mod_http2-debuginfo-0:2.0.29-10.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server
  • jbcs-httpd24-mod_ldap-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server
  • jbcs-httpd24-mod_proxy_html-1:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server
Summary
A flaw was found in HTTP/2, affecting various web servers. A remote attacker can exploit this vulnerability by combining an HPACK compression bomb with a zero-byte flow-control window. This technique allows a small amount of data to expand into large memory allocations on the server, which are then held, leading to a denial of service (DoS) by rendering the server inaccessible.
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
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-2026-35105

No EUVD known-exploited evidence

Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.

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 actionWithin 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.

What

Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.

Why

The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.

Why

The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

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.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
a network path → Memory Allocation with Excessive Size Value → disrupt the affected service
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-789 ↗

CWE-789: Memory Allocation with Excessive Size Value. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.

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.
NetworkUnauthenticatedDenial of serviceCWE-789Public exploit reference
A

Official authority intelligence

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

ENISA EUVD · EUVD-2026-35105Official EUVD mapping

Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.

Official EUVD record ↗
BSI · German · WID-SEC-2026-3595IBM 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, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen und um Sicherheitsvorkehrungen zu umgehen.

Official advisory ↗
BSI · German · WID-SEC-2026-2455Oracle Solaris Drittanbieterkomponenten: Mehrere Schwachstellen

Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in verschiedenen Komponenten von Drittanbietern in Oracle Solaris ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.

Official advisory ↗
BSI · German · WID-SEC-2026-1824Apache HTTP Server: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Apache HTTP Server ausnutzen, um beliebigen Programmcode auszuführen, Sicherheitsmaßnahmen zu umgehen, Cross-Site-Scripting-Angriffe durchzuführen, Daten zu verändern und offenzulegen, einen Denial-of-Service-Zustand zu verursachen oder andere nicht näher definierte Angriffe durchzuführen.

Official advisory ↗
BSI · German · WID-SEC-2026-1791HTTP/2-Implementierungen: Schwachstelle ermöglicht Denial of Service

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in verschiedenen HTTP/2-Implementierungen ausnutzen, um einen Denial of Service Angriff durchzuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260610Security Bulletin 10 Jun 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 10 Jun 2026, published on 10 June 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1256Multiples vulnérabilités dans les produits IBM

rd?id=CVE-2026-4867 Référence CVE CVE-2026-48801 https://www.cve.org/CVERecord?id=CVE-2026-48801 Référence CVE CVE-2026-48913 https://www.cve.org/CVERecord?id=CVE-2026-48913 Référence CVE CVE-2026-48988 https://www.cve.org/CVERecord?id=CVE-2026-48988 Référence CVE CVE-2026-49268 https://www.cve.org/CVERecord?id=CVE-2026-49268 Référence CVE CVE-2026-49356 https://www.cve.org/CVERecord?id=CVE-2026-49356 Référence CVE CVE-2026-49458 https://www.cve.org/CVERecord?id=CVE-2026-49458 Référence CVE CVE-2026-49459 https://www.cve.org/CVERecord?id=CVE-2026-49459 Référence CVE CVE-2026-49844 https://www.cve.org/CVERecord?id=CVE-2026-49844 Référence CVE CVE-2026-49975 https://www.cve.org/CVERecord?id=CVE-2026-49975 Référence CVE CVE-2026-49978 https://www.cve.org/CVERecord?id=CVE-2026-49978 Référence CVE CVE-2026-5038 https://www.cve.org/CVERecord?id=CVE-2026-5038 Référence CVE CVE-2026-5078 https://www.cve.org/CVERecord?id=CVE-2026-5078 Référence CVE CVE-2026-5079 https://www.cve.org/CVERecord?id=CVE-2026-5079 Référence CVE CVE-2026-52924 https://www.cve.org/CVERecord?id=CVE-2026-52924 Référence CVE CVE-2026-52991 https://www.cve.org/CVERecord?id=CVE-2026-52991 Référence CVE CVE-2026-53009 https://www.cve.org/CVERecord?id=CVE-2026-53009 Référence CVE CVE-2026-53016 https://www.cve.org/CVERecord?id=CVE-20

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1015Multiples vulnérabilités dans les produits Fortinet

De multiples vulnérabilités ont été découvertes dans les produits Fortinet. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, une élévation de privilèges et un déni de service à distance.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0776Vulnérabilité dans Synacor Zimbra Collaboration

Une vulnérabilité a été découverte dans Synacor Zimbra Collaboration. Elle permet à un attaquant de provoquer un déni de service à distance.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0731Multiples vulnérabilités dans les produits Microsoft

ulletin de sécurité Microsoft CVE-2026-47636 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47637 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47638 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47639 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47640 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47641 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-48560 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-48562 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-48569 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-49161 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-49975 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-50511 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-50512 du 09 juin 2026 Une gestion de version détaillée se trouve à la fin de ce document. Risques Atteinte à l'intégrité des données Atteinte à la confidentialité des données Contournement de la politique de sécurité Déni de service à distance Exécution de code arbitraire à distance Non spécifié par l'éditeur Élévation de privilèges Systèmes affectés azl3 docker-buildx 0.14.0-13 versions antérieures à 0.14.0-15 azl3 docker-compose 2.27.0-11 versions antérieures à 2.27.0-13 azl3 erlang 26.2.5.20-1 versions antérieures à 26.2.5

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0710Multiples vulnérabilités dans Apache HTTP Server

De multiples vulnérabilités ont été découvertes dans Apache HTTP Server. Certaines d'entre elles permettent à un attaquant de provoquer une élévation de privilèges, un déni de service à distance et une injection de code indirecte à distance (XSS).

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-019181Apache Software Foundation等の複数ベンダの製品における過剰なサイズ値のメモリ割り当てに関する脆弱性

Apache HTTP Serverのmod_httpにおける過剰なサイズ値を持つメモリ割り当てに関する脆弱性により、悪意のあるHTTPリクエストを介してサービス拒否が発生します。この問題は、Apache HTTP Serverのバージョン2.4.17から2.4.67までに影響を及ぼします。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-026849Cosminexus HTTP Serverにおける脆弱性

Cosminexus HTTP Serverに脆弱性(CVE-2026-49975)が存在します。 なお,HTTP/2プロトコル通信機能を使用していない場合は,本脆弱性は発生しません。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6849웹서버 HTTP/2 관련 제품 보안 업데이트 권고

nginx, Apache HTTP Server, Microsoft IIS, Envoy, Cloudflare Pingora의 HTTP/2 구현에서 발생하는 Memory Allocation with Excessive Size Value 취약점(CVE-2026-49975) [1][2][3]

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.
Patch available
Affected
Fixed
RHSA-2026:27200: Red Hat JBoss Core Services on RHEL 7 Server, Red Hat JBoss Core Services on RHEL 8
Action
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
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.
Official vendor articles1 stored document

Linked articles are downloaded and versioned as source evidence. A CVE mention or approved update relationship does not, by itself, verify a fix for every product branch.

  • PSIRT | FortiGuard Labs →Original publisher ↗Searchable text snapshot · Captured 29 Sep 2026PSIRT HTTP/2 Bomb CVE-2026-49975 Summary CVE-2026-49975 Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67. Version Affected Solution FortiPAM 1.9 1.9.0
04

Evidence and provenance

Published 8 Jun 2026 · Last source change 19 Aug 2026, 12:05 UTC · CWE-789 · Memory Allocation with Excessive Size Value

CVE recordCVE.org · 5.2
CVSS sourceCISA ADP
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-2026-35105
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
    Fixed: jbcs-httpd24-httpd-0:2.4.62-13.el7jbcs.src as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-debuginfo-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-devel-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-manual-0:2.4.62-13.el7jbcs.noarch as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-selinux-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-tools-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_http2-0:2.0.29-10.el7jbcs.src as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_http2-0:2.0.29-10.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_http2-debuginfo-0:2.0.29-10.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_ldap-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_proxy_html-1:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_session-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_ssl-1:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-0:2.4.62-13.el8jbcs.src as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-debuginfo-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-devel-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-manual-0:2.4.62-13.el8jbcs.noarch as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-selinux-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-tools-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-tools-debuginfo-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_http2-0:2.0.29-10.el8jbcs.src as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_http2-0:2.0.29-10.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_http2-debuginfo-0:2.0.29-10.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_ldap-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_ldap-debuginfo-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_proxy_html-1:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_proxy_html-debuginfo-1:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_session-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; and 313 more
    After
    Fixed: jbcs-httpd24-httpd-0:2.4.62-13.el7jbcs.src as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-debuginfo-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-devel-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-manual-0:2.4.62-13.el7jbcs.noarch as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-selinux-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-tools-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_http2-0:2.0.29-10.el7jbcs.src as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_http2-0:2.0.29-10.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_http2-debuginfo-0:2.0.29-10.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_ldap-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_proxy_html-1:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_session-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_ssl-1:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-0:2.4.62-13.el8jbcs.src as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-debuginfo-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-devel-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-manual-0:2.4.62-13.el8jbcs.noarch as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-selinux-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-tools-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-tools-debuginfo-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_http2-0:2.0.29-10.el8jbcs.src as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_http2-0:2.0.29-10.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_http2-debuginfo-0:2.0.29-10.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_ldap-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_ldap-debuginfo-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_proxy_html-1:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_proxy_html-debuginfo-1:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_session-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; and 312 more
    Red Hat Product Security ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: removed vendor advisory: access.redhat.com/RHSA-2026:55992.
    Before
    vendor advisory: access.redhat.com/RHSA-2026:55992 · vendor advisory: httpd.apache.org/vulnerabilities_24.html
    After
    vendor advisory: httpd.apache.org/vulnerabilities_24.html
    security@apache.org ↗
  3. Vendor guidanceAuthoritative vendor guidance changed: added vendor advisory: access.redhat.com/RHSA-2026:55992.
    Before
    vendor advisory: httpd.apache.org/vulnerabilities_24.html
    After
    vendor advisory: access.redhat.com/RHSA-2026:55992 · vendor advisory: httpd.apache.org/vulnerabilities_24.html
    security@apache.org ↗
  4. Affected versionsThe structured affected or fixed version information changed.
    Before
    2.4.17 ≤ 2.4.67 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    2.4.17 ≤ 2.4.67 · Fixed: 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
    Red Hat Product Security ↗
  5. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    Red Hat Product Security ↗
  6. Affected versionsThe structured affected or fixed version information changed.
    Before
    Fixed: jbcs-httpd24-httpd-0:2.4.62-13.el7jbcs.src as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-debuginfo-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-devel-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-manual-0:2.4.62-13.el7jbcs.noarch as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-selinux-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-tools-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_http2-0:2.0.29-10.el7jbcs.src as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_http2-0:2.0.29-10.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_http2-debuginfo-0:2.0.29-10.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_ldap-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_proxy_html-1:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_session-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_ssl-1:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-0:2.4.62-13.el8jbcs.src as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-debuginfo-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-devel-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-manual-0:2.4.62-13.el8jbcs.noarch as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-selinux-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-tools-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-tools-debuginfo-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_http2-0:2.0.29-10.el8jbcs.src as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_http2-0:2.0.29-10.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_http2-debuginfo-0:2.0.29-10.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_ldap-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_ldap-debuginfo-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_proxy_html-1:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_proxy_html-debuginfo-1:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_session-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; and 308 more
    After
    Fixed: jbcs-httpd24-httpd-0:2.4.62-13.el7jbcs.src as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-debuginfo-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-devel-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-manual-0:2.4.62-13.el7jbcs.noarch as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-selinux-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-tools-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_http2-0:2.0.29-10.el7jbcs.src as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_http2-0:2.0.29-10.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_http2-debuginfo-0:2.0.29-10.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_ldap-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_proxy_html-1:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_session-0:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-mod_ssl-1:2.4.62-13.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server; jbcs-httpd24-httpd-0:2.4.62-13.el8jbcs.src as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-debuginfo-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-devel-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-manual-0:2.4.62-13.el8jbcs.noarch as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-selinux-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-tools-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-httpd-tools-debuginfo-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_http2-0:2.0.29-10.el8jbcs.src as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_http2-0:2.0.29-10.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_http2-debuginfo-0:2.0.29-10.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_ldap-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_ldap-debuginfo-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_proxy_html-1:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_proxy_html-debuginfo-1:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; jbcs-httpd24-mod_session-0:2.4.62-13.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8; and 313 more
    Red Hat Product Security ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
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-2026-49975 · cve.blacktree.nl