Upstream information

CVE-2026-54789 at MITRE

Description

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.

SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail CNA (GitHub) SUSE
Base Score 7.5 7.5
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network Network
Attack Complexity Low Low
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact None None
Availability Impact High High
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1276217 [NEW]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
openSUSE Tumbleweed
  • apache2-mod_auth_openidc >= 2.4.20.2-1.1
 Patchnames:
openSUSE-Tumbleweed-2026-11582

List of packages in QA

Product(s) Package(s)
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS
  • apache2-mod_auth_openidc >= 2.4.17.1-150100.3.40.1
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
  • apache2-mod_auth_openidc >= 2.4.17.1-150100.3.40.1
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS
  • apache2-mod_auth_openidc >= 2.4.17.1-150100.3.40.1
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
  • apache2-mod_auth_openidc >= 2.4.17.1-150100.3.40.1
SUSE Linux Enterprise Module for Server Applications 15 SP7
  • apache2-mod_auth_openidc >= 2.4.17.1-150600.16.20.1
SUSE Linux Enterprise Server 15 SP7
  • apache2-mod_auth_openidc >= 2.4.17.1-150600.16.20.1
SUSE Linux Enterprise Server for SAP Applications 15 SP7
  • apache2-mod_auth_openidc >= 2.4.17.1-150600.16.20.1
SUSE Linux Enterprise High Performance Computing 15 SP7
  • apache2-mod_auth_openidc >= 2.4.17.1-150600.16.20.1
SUSE Linux Enterprise Server 12 SP5-LTSS
  • apache2-mod_auth_openidc >= 2.4.0-7.25.1
SUSE Linux Enterprise Server 12 SP5-LTSS
  • apache2-mod_auth_openidc >= 2.4.0-7.25.1
SUSE Linux Enterprise Server 15 SP4-LTSS
  • apache2-mod_auth_openidc >= 2.4.17.1-150100.3.40.1
SUSE Linux Enterprise Server 15 SP4-LTSS
  • apache2-mod_auth_openidc >= 2.4.17.1-150100.3.40.1
SUSE Linux Enterprise Server 15 SP5-LTSS
  • apache2-mod_auth_openidc >= 2.4.17.1-150100.3.40.1
SUSE Linux Enterprise Server 15 SP5-LTSS
  • apache2-mod_auth_openidc >= 2.4.17.1-150100.3.40.1
SUSE Linux Enterprise Server 15 SP6-LTSS
  • apache2-mod_auth_openidc >= 2.4.17.1-150600.16.20.1
SUSE Linux Enterprise Server 15 SP6-LTSS
  • apache2-mod_auth_openidc >= 2.4.17.1-150600.16.20.1
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5
  • apache2-mod_auth_openidc >= 2.4.0-7.25.1
SUSE Linux Enterprise Server for SAP Applications 15 SP4
  • apache2-mod_auth_openidc >= 2.4.17.1-150100.3.40.1
SUSE Linux Enterprise Server for SAP Applications 15 SP5
  • apache2-mod_auth_openidc >= 2.4.17.1-150100.3.40.1
SUSE Linux Enterprise Server for SAP Applications 15 SP6
  • apache2-mod_auth_openidc >= 2.4.17.1-150600.16.20.1
SUSE Manager Proxy LTS 4.3
  • apache2-mod_auth_openidc >= 2.4.17.1-150100.3.40.1
SUSE Manager Retail Branch Server LTS 4.3
  • apache2-mod_auth_openidc >= 2.4.17.1-150100.3.40.1
SUSE Manager Server LTS 4.3
  • apache2-mod_auth_openidc >= 2.4.17.1-150100.3.40.1

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise High Performance Computing 15 SP7 apache2-mod_auth_openidc In progress
SUSE Linux Enterprise Module for Server Applications 15 SP7 apache2-mod_auth_openidc In progress
SUSE Linux Enterprise Server 15 SP7 apache2-mod_auth_openidc In progress
SUSE Linux Enterprise Server 16.0 apache2-mod_auth_openidc In progress
SUSE Linux Enterprise Server 16.1 apache2-mod_auth_openidc Released
SUSE Linux Enterprise Server for SAP Applications 15 SP7 apache2-mod_auth_openidc In progress
SUSE Linux Enterprise Server for SAP applications 16.0 apache2-mod_auth_openidc In progress
SUSE Linux Enterprise Server for SAP applications 16.1 apache2-mod_auth_openidc Released
openSUSE Leap 16.0 apache2-mod_auth_openidc Affected
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 12 SP5 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS apache2-mod_auth_openidc In progress
SUSE Linux Enterprise High Performance Computing 15 SP5 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS apache2-mod_auth_openidc In progress
SUSE Linux Enterprise Module for Server Applications 15 SP4 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Module for Server Applications 15 SP5 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Module for Server Applications 15 SP6 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 12 SP5 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 12 SP5-LTSS apache2-mod_auth_openidc In progress
SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 15 SP4 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 15 SP4-LTSS apache2-mod_auth_openidc In progress
SUSE Linux Enterprise Server 15 SP5 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 15 SP5-LTSS apache2-mod_auth_openidc In progress
SUSE Linux Enterprise Server 15 SP6 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 15 SP6-LTSS apache2-mod_auth_openidc In progress
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 apache2-mod_auth_openidc In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP4 apache2-mod_auth_openidc In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP5 apache2-mod_auth_openidc In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP6 apache2-mod_auth_openidc In progress
SUSE Manager Proxy 4.3 apache2-mod_auth_openidc Affected
SUSE Manager Proxy LTS 4.3 apache2-mod_auth_openidc In progress
SUSE Manager Retail Branch Server 4.3 apache2-mod_auth_openidc Affected
SUSE Manager Retail Branch Server LTS 4.3 apache2-mod_auth_openidc In progress
SUSE Manager Server 4.3 apache2-mod_auth_openidc Affected
SUSE Manager Server LTS 4.3 apache2-mod_auth_openidc In progress
Products past their end of life and not receiving proactive updates anymore.
SUSE CaaS Platform 4.0 apache2-mod_auth_openidc Affected
SUSE Enterprise Storage 6 apache2-mod_auth_openidc Affected
SUSE Enterprise Storage 7 apache2-mod_auth_openidc Affected
SUSE Enterprise Storage 7.1 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise High Performance Computing 12 SP4 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise High Performance Computing 15 SP1 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS apache2-mod_auth_openidc Affected
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS apache2-mod_auth_openidc Affected
SUSE Linux Enterprise High Performance Computing 15 SP2 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS apache2-mod_auth_openidc Affected
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS apache2-mod_auth_openidc Affected
SUSE Linux Enterprise High Performance Computing 15 SP3 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS apache2-mod_auth_openidc Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS apache2-mod_auth_openidc Affected
SUSE Linux Enterprise High Performance Computing 15 SP4 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS apache2-mod_auth_openidc In progress
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS apache2-mod_auth_openidc In progress
SUSE Linux Enterprise High Performance Computing 15 SP6 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Module for Server Applications 15 SP1 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Module for Server Applications 15 SP2 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Module for Server Applications 15 SP3 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Real Time 15 SP2 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Real Time 15 SP3 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Real Time 15 SP4 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 12 SP4-ESPOS apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 12 SP4-LTSS apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 15 SP1 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 15 SP1-BCL apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 15 SP1-LTSS apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 15 SP2 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 15 SP2-BCL apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 15 SP2-LTSS apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 15 SP3 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 15 SP3-BCL apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server 15 SP3-LTSS apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP1 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP2 apache2-mod_auth_openidc Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 apache2-mod_auth_openidc Affected
SUSE Manager Proxy 4.0 apache2-mod_auth_openidc Affected
SUSE Manager Proxy 4.1 apache2-mod_auth_openidc Affected
SUSE Manager Proxy 4.2 apache2-mod_auth_openidc Affected
SUSE Manager Retail Branch Server 4.0 apache2-mod_auth_openidc Affected
SUSE Manager Retail Branch Server 4.1 apache2-mod_auth_openidc Affected
SUSE Manager Retail Branch Server 4.2 apache2-mod_auth_openidc Affected
SUSE Manager Server 4.0 apache2-mod_auth_openidc Affected
SUSE Manager Server 4.1 apache2-mod_auth_openidc Affected
SUSE Manager Server 4.2 apache2-mod_auth_openidc Affected
SUSE OpenStack Cloud 9 apache2-mod_auth_openidc Affected
SUSE OpenStack Cloud Crowbar 9 apache2-mod_auth_openidc Affected
openSUSE Leap 15.3 apache2-mod_auth_openidc Affected
openSUSE Leap 15.4 apache2-mod_auth_openidc Affected
openSUSE Leap 15.5 apache2-mod_auth_openidc Affected
openSUSE Leap 15.6 apache2-mod_auth_openidc Affected

SUSE Timeline for this CVE

CVE page created: Mon Aug 24 11:38:57 2026
CVE page last modified: Wed Aug 26 11:45:02 2026