RHSA-2026:23230HighCVSS 7.5

Red Hat Security Advisory: expat security update

Published
June 4, 2026
Last Modified
September 21, 2026

🔗 CVE IDs covered (1)

CVE-2026-45186 →

📋 Description

CVE-2026-45186 — libexpat: denial of service via crafted XML input

🎯 Affected products33

  • Red Hat Enterprise Linux AppStream (v. 9)
  • Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-0:2.5.0-6.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-0:2.5.0-6.el9_8.1.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-0:2.5.0-6.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-0:2.5.0-6.el9_8.1.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-0:2.5.0-6.el9_8.1.src as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-0:2.5.0-6.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-debuginfo-0:2.5.0-6.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • expat-debuginfo-0:2.5.0-6.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-debuginfo-0:2.5.0-6.el9_8.1.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • expat-debuginfo-0:2.5.0-6.el9_8.1.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-debuginfo-0:2.5.0-6.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • expat-debuginfo-0:2.5.0-6.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-debuginfo-0:2.5.0-6.el9_8.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • expat-debuginfo-0:2.5.0-6.el9_8.1.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-debuginfo-0:2.5.0-6.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • expat-debuginfo-0:2.5.0-6.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-debugsource-0:2.5.0-6.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • expat-debugsource-0:2.5.0-6.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-debugsource-0:2.5.0-6.el9_8.1.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • expat-debugsource-0:2.5.0-6.el9_8.1.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-debugsource-0:2.5.0-6.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • expat-debugsource-0:2.5.0-6.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-debugsource-0:2.5.0-6.el9_8.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • expat-debugsource-0:2.5.0-6.el9_8.1.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-debugsource-0:2.5.0-6.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • expat-debugsource-0:2.5.0-6.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • expat-devel-0:2.5.0-6.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • expat-devel-0:2.5.0-6.el9_8.1.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • +3 more not shown

✅ 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: To mitigate this vulnerability, restrict the maximum size of incoming XML payloads. It is especially critical to limit the decompressed size if the application accepts compressed XML files. Also, consider running the application inside a container or a restricted environment to ensure that the high consumption of CPU resources does not affect the host system.

🔗 References (4)