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Full vulnerability report · 2026
CVE-2026-54789High confidence

mod_auth_openidc has out-of-bounds read and write in state cookie parsing

OpenIDC · mod auth openidc

Official source article: GitHub GHSA-VGR5-QCPP-X2PR ↗. Check the applicable product and release in the original source.

7.5HighCVSS 3.1
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 0.72% 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 OpenIDC mod auth openidc 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

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

5 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
Debian trixietrixie · sourcelibapache2-mod-auth-openidcVendor fix publishedDebian records a fixed source-package version for this release.2.4.17-1+deb13u1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcelibapache2-mod-auth-openidcVendor fix publishedDebian records a fixed source-package version for this release.2.4.12.3-2+deb12u5Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcelibapache2-mod-auth-openidcVendor fix publishedDebian records a fixed source-package version for this release.2.4.19.4-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcelibapache2-mod-auth-openidcVendor fix publishedDebian records a fixed source-package version for this release.2.4.19.4-1Debian Security Tracker ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelibapache2-mod-auth-openidcUnder evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.Not published in this feedCanonical 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-2026-54789 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitymod_auth_openidc: mod_auth_openidc: Denial of Service via malformed state cookie parsing
7 known affected

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

  • cjose-devel (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8
  • cjose.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8
  • cjose (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8
  • mod_auth_openidc.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8
  • mod_auth_openidc (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8
  • mod_auth_openidc as a component of Red Hat Enterprise Linux 9
  • mod_auth_openidc.src as a component of Red Hat Enterprise Linux 9
Summary
A flaw was found in mod_auth_openidc, an OpenID Connect Relying Party module for Apache HTTP servers. A remote attacker can exploit this vulnerability by sending a specially crafted HTTP request with a malformed state cookie. This can lead to an out-of-bounds read and a one-byte out-of-bounds write during state cookie parsing, primarily resulting in a Denial of Service (DoS) for the affected server.
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-2026-64000

No EUVD known-exploited evidence

mod_auth_openidc is an OpenID Certified authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. Prior to 2.4.19.4, an out-of-bounds read and a one-byte out-of-bounds write exist in the state-cookie parser of `mod_auth_openidc`. The issue is fixed in version 2.4.19.4 by stopping the scan at the string terminator so a value-less token is rejected. No in-product workarounds are available. As a stop-gap, an upstream reverse proxy or WAF that rejects or normalizes malformed `Cookie` headers (tokens lacking `=`) can reduce exposure, but upgrading is the recommended remediation.

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; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

mod_auth_openidc is an OpenID Certified authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. Prior to 2.4.19.4, an out-of-bounds read and a one-byte out-of-bounds write exist in the state-cookie parser of `mod_auth_openidc`. The issue is fixed in version 2.4.19.4 by stopping the scan at the string terminator so a value-less token is rejected. No in-product workarounds are available. As a stop-gap, an upstream reverse proxy or WAF that rejects or normalizes malformed `Cookie` headers (tokens lacking `=`) can reduce exposure, but upgrading is the recommended remediation.

What

mod_auth_openidc is an OpenID Certified authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. Prior to 2.4.19.4, an out-of-bounds read and a one-byte out-of-bounds write exist in the state-cookie parser of `mod_auth_openidc`. The issue is fixed in version 2.4.19.4 by stopping the scan at the string terminator so a value-less token is rejected. No in-product workarounds are available. As a stop-gap, an upstream reverse proxy or WAF that rejects or normalizes malformed `Cookie` headers (tokens lacking `=`) can reduce exposure, but upgrading is the recommended remediation.

Why

The product reads data past the end, or before the beginning, of the intended buffer.

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

mod_auth_openidc is an OpenID Certified authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. Prior to 2.4.19.4, an out-of-bounds read and a one-byte out-of-bounds write exist in the state-cookie parser of `mod_auth_openidc`. The issue is fixed in version 2.4.19.4 by stopping the scan at the string terminator so a value-less token is rejected. No in-product workarounds are available. As a stop-gap, an upstream reverse proxy or WAF that rejects or normalizes malformed `Cookie` headers (tokens lacking `=`) can reduce exposure, but upgrading is the recommended remediation.

Why

The product reads data past the end, or before the beginning, of the intended buffer.

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 → Out-of-bounds Read → 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-125 ↗

CWE-125: Out-of-bounds Read. The product reads data past the end, or before the beginning, of the intended buffer.

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
Stolen credentials, tokens and legitimate administration functions may provide continued access without deploying a large custom toolset.
NetworkUnauthenticatedCWE-125
A

Official authority intelligence

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

ENISA EUVD · EUVD-2026-64000Official EUVD mapping

mod_auth_openidc is an OpenID Certified authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. Prior to 2.4.19.4, an out-of-bounds read and a one-byte out-of-bounds write exist in the state-cookie parser of `mod_auth_openidc`. The issue is fixed in version 2.4.19.4 by stopping the scan at the string terminator so a value-less token is rejected. No in-product workarounds are available. As a stop-gap, an upstream reverse proxy or WAF that rejects or normalizes malformed `Cookie` headers (tokens lacking `=`) can reduce exposure, but upgrading is the recommended remediation.

Official EUVD record ↗
BSI · German · WID-SEC-2026-3492Red Hat Enterprise Linux (mod_auth_openidc): Schwachstelle ermöglicht Denial of Service

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux ausnutzen, um einen Denial of Service Angriff durchzuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260826Security Bulletin 26 Aug 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 26 Aug 2026, published on 26 August 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

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
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 21 Aug 2026 · Last source change 2 Sept 2026, 19:06 UTC · CWE-125 · Out-of-bounds Read

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 2026-08-23
European sourceENISA EUVD · EUVD-2026-64000
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD not scheduled

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
    mod_auth_openidc as a component of Red Hat Enterprise Linux 10; mod_auth_openidc.src as a component of Red Hat Enterprise Linux 10; cjose-devel (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; cjose.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; cjose (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; mod_auth_openidc.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; mod_auth_openidc (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; mod_auth_openidc as a component of Red Hat Enterprise Linux 9; mod_auth_openidc.src as a component of Red Hat Enterprise Linux 9 · Fixed: mod_auth_openidc-0:1.8.8-9.el7_9.2.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-0:1.8.8-9.el7_9.2.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-0:1.8.8-9.el7_9.2.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-0:1.8.8-9.el7_9.2.src as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-0:1.8.8-9.el7_9.2.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-debuginfo-0:1.8.8-9.el7_9.2.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-debuginfo-0:1.8.8-9.el7_9.2.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-debuginfo-0:1.8.8-9.el7_9.2.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-debuginfo-0:1.8.8-9.el7_9.2.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-0:2.4.15-4.el10_0.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-0:2.4.15-4.el10_0.2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-0:2.4.15-4.el10_0.2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-0:2.4.15-4.el10_0.2.src as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-0:2.4.15-4.el10_0.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debuginfo-0:2.4.15-4.el10_0.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debuginfo-0:2.4.15-4.el10_0.2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debuginfo-0:2.4.15-4.el10_0.2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debuginfo-0:2.4.15-4.el10_0.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debugsource-0:2.4.15-4.el10_0.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debugsource-0:2.4.15-4.el10_0.2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debugsource-0:2.4.15-4.el10_0.2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debugsource-0:2.4.15-4.el10_0.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); cjose-0:0.6.1-3.module+el8.4.0+19462+14bde120.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); cjose-0:0.6.1-3.module+el8.4.0+19462+14bde120.x86_64 (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); cjose-debuginfo-0:0.6.1-3.module+el8.4.0+19462+14bde120.x86_64 (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); cjose-debugsource-0:0.6.1-3.module+el8.4.0+19462+14bde120.x86_64 (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); cjose-devel-0:0.6.1-3.module+el8.4.0+19462+14bde120.x86_64 (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); mod_auth_openidc-0:2.4.9.4-1.module+el8.4.0+24868+593d10ef.3.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); mod_auth_openidc-0:2.4.9.4-1.module+el8.4.0+24868+593d10ef.3.x86_64 (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); mod_auth_openidc-debuginfo-0:2.4.9.4-1.module+el8.4.0+24868+593d10ef.3.x86_64 (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); and 92 more
    After
    cjose-devel (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; cjose.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; cjose (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; mod_auth_openidc.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; mod_auth_openidc (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; mod_auth_openidc as a component of Red Hat Enterprise Linux 9; mod_auth_openidc.src as a component of Red Hat Enterprise Linux 9 · Fixed: mod_auth_openidc-0:1.8.8-9.el7_9.2.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-0:1.8.8-9.el7_9.2.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-0:1.8.8-9.el7_9.2.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-0:1.8.8-9.el7_9.2.src as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-0:1.8.8-9.el7_9.2.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-debuginfo-0:1.8.8-9.el7_9.2.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-debuginfo-0:1.8.8-9.el7_9.2.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-debuginfo-0:1.8.8-9.el7_9.2.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-debuginfo-0:1.8.8-9.el7_9.2.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-0:2.4.15-4.el10_0.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-0:2.4.15-4.el10_0.2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-0:2.4.15-4.el10_0.2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-0:2.4.15-4.el10_0.2.src as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-0:2.4.15-4.el10_0.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debuginfo-0:2.4.15-4.el10_0.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debuginfo-0:2.4.15-4.el10_0.2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debuginfo-0:2.4.15-4.el10_0.2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debuginfo-0:2.4.15-4.el10_0.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debugsource-0:2.4.15-4.el10_0.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debugsource-0:2.4.15-4.el10_0.2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debugsource-0:2.4.15-4.el10_0.2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debugsource-0:2.4.15-4.el10_0.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-0:2.4.16.11-1.el10_2.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); mod_auth_openidc-0:2.4.16.11-1.el10_2.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); mod_auth_openidc-0:2.4.16.11-1.el10_2.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); mod_auth_openidc-0:2.4.16.11-1.el10_2.1.src as a component of Red Hat Enterprise Linux AppStream (v. 10); mod_auth_openidc-0:2.4.16.11-1.el10_2.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); mod_auth_openidc-debuginfo-0:2.4.16.11-1.el10_2.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); mod_auth_openidc-debuginfo-0:2.4.16.11-1.el10_2.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); mod_auth_openidc-debuginfo-0:2.4.16.11-1.el10_2.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); and 105 more
    Red Hat Product Security ↗
  2. Vendor guidanceAuthoritative vendor guidance changed from remediation: access.redhat.com/CVE-2026-54789 to remediation: access.redhat.com/CVE-2026-54789.
    Before
    remediation: access.redhat.com/CVE-2026-54789
    After
    remediation: access.redhat.com/CVE-2026-54789
    Red Hat Product Security ↗
  3. Remediation statusRemediation status changed from Mitigation available to Patch available.
    Before
    Mitigation available
    After
    Patch available
    Red Hat Product Security ↗
  4. Affected versionsThe structured affected or fixed version information changed.
    Before
    mod_auth_openidc as a component of Red Hat Enterprise Linux 10; mod_auth_openidc.src as a component of Red Hat Enterprise Linux 10; mod_auth_openidc as a component of Red Hat Enterprise Linux 7; mod_auth_openidc.src as a component of Red Hat Enterprise Linux 7; cjose-devel (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; cjose.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; cjose (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; mod_auth_openidc.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; mod_auth_openidc (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; mod_auth_openidc as a component of Red Hat Enterprise Linux 9; mod_auth_openidc.src as a component of Red Hat Enterprise Linux 9
    After
    mod_auth_openidc as a component of Red Hat Enterprise Linux 10; mod_auth_openidc.src as a component of Red Hat Enterprise Linux 10; cjose-devel (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; cjose.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; cjose (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; mod_auth_openidc.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; mod_auth_openidc (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux 8; mod_auth_openidc as a component of Red Hat Enterprise Linux 9; mod_auth_openidc.src as a component of Red Hat Enterprise Linux 9 · Fixed: mod_auth_openidc-0:1.8.8-9.el7_9.2.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-0:1.8.8-9.el7_9.2.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-0:1.8.8-9.el7_9.2.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-0:1.8.8-9.el7_9.2.src as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-0:1.8.8-9.el7_9.2.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-debuginfo-0:1.8.8-9.el7_9.2.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-debuginfo-0:1.8.8-9.el7_9.2.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-debuginfo-0:1.8.8-9.el7_9.2.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-debuginfo-0:1.8.8-9.el7_9.2.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); mod_auth_openidc-0:2.4.15-4.el10_0.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-0:2.4.15-4.el10_0.2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-0:2.4.15-4.el10_0.2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-0:2.4.15-4.el10_0.2.src as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-0:2.4.15-4.el10_0.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debuginfo-0:2.4.15-4.el10_0.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debuginfo-0:2.4.15-4.el10_0.2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debuginfo-0:2.4.15-4.el10_0.2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debuginfo-0:2.4.15-4.el10_0.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debugsource-0:2.4.15-4.el10_0.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debugsource-0:2.4.15-4.el10_0.2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debugsource-0:2.4.15-4.el10_0.2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); mod_auth_openidc-debugsource-0:2.4.15-4.el10_0.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); cjose-0:0.6.1-3.module+el8.4.0+19462+14bde120.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); cjose-0:0.6.1-3.module+el8.4.0+19462+14bde120.x86_64 (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); cjose-debuginfo-0:0.6.1-3.module+el8.4.0+19462+14bde120.x86_64 (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); cjose-debugsource-0:0.6.1-3.module+el8.4.0+19462+14bde120.x86_64 (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); cjose-devel-0:0.6.1-3.module+el8.4.0+19462+14bde120.x86_64 (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); mod_auth_openidc-0:2.4.9.4-1.module+el8.4.0+24868+593d10ef.3.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); mod_auth_openidc-0:2.4.9.4-1.module+el8.4.0+24868+593d10ef.3.x86_64 (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); mod_auth_openidc-debuginfo-0:2.4.9.4-1.module+el8.4.0+24868+593d10ef.3.x86_64 (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4); and 92 more
    Red Hat Product Security ↗
  5. Vendor guidanceAuthoritative vendor guidance changed from remediation: access.redhat.com/CVE-2026-54789 to remediation: access.redhat.com/CVE-2026-54789.
    Before
    remediation: access.redhat.com/CVE-2026-54789
    After
    remediation: access.redhat.com/CVE-2026-54789
    Red Hat Product Security ↗
  6. ENISA EUVD mappingEUVD-2026-64000 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2026-64000"}
    ENISA EUVD ↗
  7. Affected versionsThe structured affected or fixed version information changed.
    Before
    < 2.4.19.4 · Fixed: 2.4.19.4
    After
    mod auth openidc: < 2.4.19.4 · Fixed: 2.4.19.4
    CNA ↗
  8. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
  9. Vendor guidanceAuthoritative vendor guidance changed: added remediation: github.com/GHSA-vgr5-qcpp-x2pr; removed remediation: github.com/8017478471cc071c49aa073c5c9be652a73a8630.
    Before
    remediation: github.com/8017478471cc071c49aa073c5c9be652a73a8630
    After
    remediation: github.com/GHSA-vgr5-qcpp-x2pr
    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-2026-64000↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor reference · GitHub GHSA-VGR5-QCPP-X2PR↗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-2026-54789 · cve.blacktree.nl