RHSA-2026:50771HighCVSS 7.5

Red Hat Security Advisory: python3.12 security update

Published
August 5, 2026
Last Modified
August 5, 2026

🔗 CVE IDs covered (1)

CVE-2026-15308 →

📋 Description

CVE-2026-15308 — python: Python: CPU Denial of Service in HTML parser via repeated unterminated markup declarations

🎯 Affected products30

  • Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-0:3.12.1-4.el9_4.14.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-0:3.12.1-4.el9_4.14.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-0:3.12.1-4.el9_4.14.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-0:3.12.1-4.el9_4.14.src as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-0:3.12.1-4.el9_4.14.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-debuginfo-0:3.12.1-4.el9_4.14.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-debuginfo-0:3.12.1-4.el9_4.14.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-debuginfo-0:3.12.1-4.el9_4.14.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-debuginfo-0:3.12.1-4.el9_4.14.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-debuginfo-0:3.12.1-4.el9_4.14.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-debugsource-0:3.12.1-4.el9_4.14.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-debugsource-0:3.12.1-4.el9_4.14.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-debugsource-0:3.12.1-4.el9_4.14.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-debugsource-0:3.12.1-4.el9_4.14.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-debugsource-0:3.12.1-4.el9_4.14.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-devel-0:3.12.1-4.el9_4.14.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-devel-0:3.12.1-4.el9_4.14.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-devel-0:3.12.1-4.el9_4.14.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-devel-0:3.12.1-4.el9_4.14.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-devel-0:3.12.1-4.el9_4.14.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-libs-0:3.12.1-4.el9_4.14.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-libs-0:3.12.1-4.el9_4.14.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-libs-0:3.12.1-4.el9_4.14.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-libs-0:3.12.1-4.el9_4.14.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-libs-0:3.12.1-4.el9_4.14.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-tkinter-0:3.12.1-4.el9_4.14.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-tkinter-0:3.12.1-4.el9_4.14.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-tkinter-0:3.12.1-4.el9_4.14.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • python3.12-tkinter-0:3.12.1-4.el9_4.14.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)

✅ 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: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

🔗 References (4)