SUSE-SU-2026:3953-1: important: Security update for apache2-mod_auth_openidc

[SLE-SECURITY-UPDATES]

# Security update for apache2-mod_auth_openidc

Announcement ID: SUSE-SU-2026:3953-1  
Release Date: 2026-09-03T07:45:36Z  
Rating: important  
References:

  * bsc#1276217

  
Cross-References:

  * CVE-2026-54789

  
CVSS scores:

  * CVE-2026-54789 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-54789 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * SUSE Linux Enterprise High Performance Computing 15 SP4
  * SUSE Linux Enterprise High Performance Computing 15 SP5
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
  * SUSE Linux Enterprise Server 15 SP4
  * SUSE Linux Enterprise Server 15 SP4 LTSS
  * SUSE Linux Enterprise Server 15 SP5
  * SUSE Linux Enterprise Server 15 SP5 LTSS
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4
  * SUSE Linux Enterprise Server for SAP Applications 15 SP5

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for apache2-mod_auth_openidc fixes the following issue:

  * CVE-2026-54789: out-of-bounds read and one-byte out-of-bounds write in the
    state-cookie parser of `mod_auth_openidc` (bsc#1276217).

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Enterprise Server 15 SP5 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-3953=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP4  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-3953=1

  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-3953=1

  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-3953=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP5  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-3953=1

  * SUSE Linux Enterprise Server 15 SP4 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-3953=1

  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-3953=1

  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-3953=1

## Package List:

  * SUSE Linux Enterprise Server for SAP Applications 15 SP5 (ppc64le x86_64)
    * apache2-mod_auth_openidc-debugsource-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-debuginfo-2.4.17.1-150100.3.40.1
  * SUSE Linux Enterprise Server 15 SP5 LTSS (aarch64 ppc64le s390x x86_64)
    * apache2-mod_auth_openidc-debugsource-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-debuginfo-2.4.17.1-150100.3.40.1
  * SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)
    * apache2-mod_auth_openidc-debugsource-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-debuginfo-2.4.17.1-150100.3.40.1
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (aarch64
    x86_64)
    * apache2-mod_auth_openidc-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-debugsource-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-debuginfo-2.4.17.1-150100.3.40.1
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64
    x86_64)
    * apache2-mod_auth_openidc-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-debugsource-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-debuginfo-2.4.17.1-150100.3.40.1
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (aarch64
    x86_64)
    * apache2-mod_auth_openidc-debugsource-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-debuginfo-2.4.17.1-150100.3.40.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)
    * apache2-mod_auth_openidc-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-debugsource-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-debuginfo-2.4.17.1-150100.3.40.1
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64
    x86_64)
    * apache2-mod_auth_openidc-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-debugsource-2.4.17.1-150100.3.40.1
    * apache2-mod_auth_openidc-debuginfo-2.4.17.1-150100.3.40.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-54789.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1276217

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