RHSA-2026:69715HighCVSS 7.5

Red Hat Security Advisory: mod_auth_openidc security update

Published
September 22, 2026
Last Modified
September 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-54789 →

📋 Description

CVE-2026-54789 — mod_auth_openidc: mod_auth_openidc: Denial of Service via malformed state cookie parsing

🎯 Affected products10

  • Red Hat Enterprise Linux Server (v. 7 ELS)
  • 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)

✅ 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 Workaround: Inspect incoming HTTP requests using a Web Application Firewall (WAF), reverse proxy, or Apache’s mod_rewrite module prior to evaluation by mod_auth_openidc. Configure security rules to reject or drop any requests containing malformed Cookie headers—specifically OpenID Connect state cookie tokens that lack an equals sign (=).

🔗 References (4)