BlackTreeCVE Intelligence
← Back to the CVE catalogue
Full vulnerability report · 2026
CVE-2026-56434High confidence

NGINX ngx_http_ssi_module vulnerability

F5 · NGINX Plus

Official source article: F5 K000162098 ↗. Check the applicable product and release in the original source.

8.3HighCVSS 4.0
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
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 0.42% 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 F5 NGINX Plus 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.

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 · mainnginxVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.28.3-r6Alpine 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-r6Alpine 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-r2Alpine Security Database ↗Source updated 3 Oct 2026
Debian trixietrixie · sourcenginxVendor fix publishedDebian records a fixed source-package version for this release.1.26.3-3+deb13u8Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcenginxVendor fix publishedDebian records a fixed source-package version for this release.1.22.1-9+deb12u10Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcenginxVendor fix publishedDebian records a fixed source-package version for this release.1.30.1-7Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcenginxVendor fix publishedDebian records a fixed source-package version for this release.1.30.1-7Debian Security Tracker ↗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.1.24.0-2ubuntu7.14Canonical 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.

1 current
CVE-2026-56434 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitynginx: NGINX: Heap buffer over-read allows memory modification or denial of service
1 known affected

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

  • insights-proxy/insights-proxy-container-rhel9 as a component of Red Hat Lightspeed proxy 1
Summary
A vulnerability in NGINX's ngx_http_ssi_module allows an unauthenticated MITM attacker to trigger a heap buffer over-read by manipulating upstream server responses. This requires SSI, proxy_pass, and proxy_buffering off to be configured, and can result in memory modification or a Denial of Service (DoS).
Remediation
For details on how to apply this update, which includes the changes described in this advisory, 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-2026-44684

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

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
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssi_module module. This vulnerability may exist when the Server-Side Includes (SSI), proxy_pass, and proxy_buffering off directives are configured. With this configuration, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to cause a use-after-free in the NGINX worker process. This issue may lead to limited modification of memory or a restart of the NGINX worker process. Impact: This vulnerability may allow remote attackers to have limited control to modify memory contents or restart the NGINX worker process. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

What

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssi_module module. This vulnerability may exist when the Server-Side Includes (SSI), proxy_pass, and proxy_buffering off directives are configured. With this configuration, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to cause a use-after-free in the NGINX worker process. This issue may lead to limited modification of memory or a restart of the NGINX worker process. Impact: This vulnerability may allow remote attackers to have limited control to modify memory contents or restart the NGINX worker process. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

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

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssi_module module. This vulnerability may exist when the Server-Side Includes (SSI), proxy_pass, and proxy_buffering off directives are configured. With this configuration, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to cause a use-after-free in the NGINX worker process. This issue may lead to limited modification of memory or a restart of the NGINX worker process. Impact: This vulnerability may allow remote attackers to have limited control to modify memory contents or restart the NGINX worker process. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

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 → Use After Free → 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
Not a CVSS 4.0 base metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-416 ↗

CWE-416: Use After Free. The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

Common Vulnerability Scoring System 4.0: 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.ATPresentAttack requirements: A particular deployment or execution condition must be present.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.VCNoneVulnerable-system confidentiality: No direct loss is represented by this metric.VILowVulnerable-system integrity: A successful attack can cause a limited loss.VAHighVulnerable-system availability: A successful attack can cause a major loss.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SINoneSubsequent-system integrity: No direct loss is represented by this metric.SANoneSubsequent-system availability: No direct loss is represented by this metric.
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-416
A

Official authority intelligence

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

BSI · German · WID-SEC-2026-2383NGINX NGINX Plus: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in NGINX NGINX Plus ausnutzen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, um Daten zu manipulieren, und um Informationen offenzulegen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260722Security Bulletin 22 Jul 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 22 Jul 2026, published on 22 July 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0894Multiples vulnérabilités dans les produits F5

De multiples vulnérabilités ont été découvertes dans les produits F5. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et une atteinte à la confidentialité des données.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-027781F5 NetworksのNGINX Gateway Fabric等の複数製品における解放済みメモリの使用に関する脆弱性

NGINX PlusおよびNGINXオープンソースには、ngx_http_ssi_moduleモジュールに脆弱性があります。この脆弱性は、サーバーサイドインクルード（SSI）、proxy_pass、およびproxy_buffering offディレクティブが設定されている場合に存在する可能性があります。この設定により、中間者攻撃（MITM）の能力を持ち、上流サーバーからのレスポンスを制御できる認証されていない攻撃者が、NGINXワーカープロセス内でuse-after-freeを引き起こす可能性があります。この問題は、メモリの限定的な改変やNGINXワーカープロセスの再起動を招く可能性があります。影響としては、この脆弱性によりリモート攻撃者がメモリ内容の限定的な改変やNGINXワーカープロセスの再起動を行う制御を獲得する可能性があります。コントロールプレーンの露出はなく、データプレーンの問題に限定されます。注意点として、技術サポート終了（EoTS）に達したソフトウェアバージョンは評価対象外です。

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
insights-proxy/insights-proxy-container-rhel9 as a component of Red Hat Lightspeed proxy 1
Fixed
Action
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
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 15 Jul 2026 · Last source change 15 Jul 2026, 18:10 UTC · CWE-416 · Use After Free

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-2026-44684
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD enriched

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
    37.0.0.1 < 37.0.3.1; R36 < R36 P7; R33 < *; 1.31.2 < 1.31.3; 0.8.11 < 1.30.4 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    37.0.0.1 < 37.0.3.1; R36 < R36 P7; R33 < *; 1.31.2 < 1.31.3; 0.8.11 < 1.30.4 · Fixed: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
    Red Hat Product Security ↗
  2. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    Red Hat Product Security ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    insights-proxy/insights-proxy-container-rhel9 as a component of Red Hat Lightspeed proxy 1 · Fixed: nginx-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.src as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-all-modules-2:1.26.3-6.el10_2.6.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-filesystem-2:1.26.3-6.el10_2.6.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); and 367 more
    After
    insights-proxy/insights-proxy-container-rhel9 as a component of Red Hat Lightspeed proxy 1 · Fixed: nginx-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.src as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-all-modules-2:1.26.3-6.el10_2.6.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-filesystem-2:1.26.3-6.el10_2.6.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); and 370 more
    Red Hat Product Security ↗
  4. Affected versionsThe structured affected or fixed version information changed.
    Before
    insights-proxy/insights-proxy-container-rhel9 as a component of Red Hat Lightspeed proxy 1 · Fixed: nginx-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.src as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-all-modules-2:1.26.3-6.el10_2.6.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-filesystem-2:1.26.3-6.el10_2.6.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); and 365 more
    After
    insights-proxy/insights-proxy-container-rhel9 as a component of Red Hat Lightspeed proxy 1 · Fixed: nginx-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.src as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-all-modules-2:1.26.3-6.el10_2.6.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-filesystem-2:1.26.3-6.el10_2.6.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); and 367 more
    Red Hat Product Security ↗
  5. Affected versionsThe structured affected or fixed version information changed.
    Before
    nginx as a component of Red Hat Enterprise Linux 9; nginx-all-modules as a component of Red Hat Enterprise Linux 9; nginx-all-modules (nginx:1.24) as a component of Red Hat Enterprise Linux 9; nginx-all-modules (nginx:1.26) as a component of Red Hat Enterprise Linux 9; nginx-core as a component of Red Hat Enterprise Linux 9; nginx-core (nginx:1.24) as a component of Red Hat Enterprise Linux 9; nginx-core (nginx:1.26) as a component of Red Hat Enterprise Linux 9; nginx-filesystem as a component of Red Hat Enterprise Linux 9; nginx-filesystem (nginx:1.24) as a component of Red Hat Enterprise Linux 9; nginx-filesystem (nginx:1.26) as a component of Red Hat Enterprise Linux 9; nginx-mod-devel as a component of Red Hat Enterprise Linux 9; nginx-mod-devel (nginx:1.24) as a component of Red Hat Enterprise Linux 9; nginx-mod-devel (nginx:1.26) as a component of Red Hat Enterprise Linux 9; nginx-mod-http-image-filter as a component of Red Hat Enterprise Linux 9; nginx-mod-http-image-filter (nginx:1.24) as a component of Red Hat Enterprise Linux 9; nginx-mod-http-image-filter (nginx:1.26) as a component of Red Hat Enterprise Linux 9; nginx-mod-http-perl as a component of Red Hat Enterprise Linux 9; nginx-mod-http-perl (nginx:1.24) as a component of Red Hat Enterprise Linux 9; nginx-mod-http-perl (nginx:1.26) as a component of Red Hat Enterprise Linux 9; nginx-mod-http-xslt-filter as a component of Red Hat Enterprise Linux 9; nginx-mod-http-xslt-filter (nginx:1.24) as a component of Red Hat Enterprise Linux 9; nginx-mod-http-xslt-filter (nginx:1.26) as a component of Red Hat Enterprise Linux 9; nginx-mod-mail as a component of Red Hat Enterprise Linux 9; nginx-mod-mail (nginx:1.24) as a component of Red Hat Enterprise Linux 9; nginx-mod-mail (nginx:1.26) as a component of Red Hat Enterprise Linux 9; nginx-mod-stream as a component of Red Hat Enterprise Linux 9; nginx-mod-stream (nginx:1.24) as a component of Red Hat Enterprise Linux 9; nginx-mod-stream (nginx:1.26) as a component of Red Hat Enterprise Linux 9; nginx.src as a component of Red Hat Enterprise Linux 9; nginx.src (nginx:1.24) as a component of Red Hat Enterprise Linux 9; and 4 more · Fixed: nginx-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.src as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-all-modules-2:1.26.3-6.el10_2.6.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-filesystem-2:1.26.3-6.el10_2.6.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); and 132 more
    After
    insights-proxy/insights-proxy-container-rhel9 as a component of Red Hat Lightspeed proxy 1 · Fixed: nginx-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.src as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-all-modules-2:1.26.3-6.el10_2.6.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-core-debuginfo-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debuginfo-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-debugsource-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-filesystem-2:1.26.3-6.el10_2.6.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-2:1.26.3-6.el10_2.6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-mod-http-image-filter-debuginfo-2:1.26.3-6.el10_2.6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); and 365 more
    Red Hat Product Security ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2026-44684↗Red Hat Product Security security advisory↗CVE authority or vendor reference · F5 K000162098↗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-2026-56434 · cve.blacktree.nl