RHSA-2026:69712HighCVSS 7.5

Red Hat Security Advisory: mod_auth_openidc:2.3 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 products20

  • Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • 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.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (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-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 EUS EXTENSION (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-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 EUS EXTENSION (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-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 EUS EXTENSION (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)
  • 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 EUS EXTENSION (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.src (mod_auth_openidc:2.3) as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (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-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 EUS EXTENSION (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)
  • 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 EUS EXTENSION (v.8.4)
  • mod_auth_openidc-debugsource-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-debugsource-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 EUS EXTENSION (v.8.4)

✅ 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)