RHSA-2026:26187HighCVSS 8.1

Red Hat Security Advisory: python3.11 security update

Published
June 16, 2026
Last Modified
August 10, 2026

🔗 CVE IDs covered (2)

CVE-2026-4786 →CVE-2026-6100 →

📋 Description

CVE-2026-4786 — python: cpython: Python: Arbitrary code execution via command injection in webbrowser.open() API CVE-2026-6100 — python: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules

🎯 Affected products32

  • Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • python3.11-0:3.11.2-2.el8_8.10.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-0:3.11.2-2.el8_8.10.src as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-0:3.11.2-2.el8_8.10.src as a component of Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • python3.11-0:3.11.2-2.el8_8.10.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-0:3.11.2-2.el8_8.10.x86_64 as a component of Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • python3.11-debuginfo-0:3.11.2-2.el8_8.10.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-debuginfo-0:3.11.2-2.el8_8.10.i686 as a component of Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • python3.11-debuginfo-0:3.11.2-2.el8_8.10.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-debuginfo-0:3.11.2-2.el8_8.10.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-debuginfo-0:3.11.2-2.el8_8.10.x86_64 as a component of Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • python3.11-debugsource-0:3.11.2-2.el8_8.10.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-debugsource-0:3.11.2-2.el8_8.10.i686 as a component of Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • python3.11-debugsource-0:3.11.2-2.el8_8.10.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-debugsource-0:3.11.2-2.el8_8.10.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-debugsource-0:3.11.2-2.el8_8.10.x86_64 as a component of Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • python3.11-devel-0:3.11.2-2.el8_8.10.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-devel-0:3.11.2-2.el8_8.10.i686 as a component of Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • python3.11-devel-0:3.11.2-2.el8_8.10.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-devel-0:3.11.2-2.el8_8.10.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-devel-0:3.11.2-2.el8_8.10.x86_64 as a component of Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • python3.11-libs-0:3.11.2-2.el8_8.10.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-libs-0:3.11.2-2.el8_8.10.i686 as a component of Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • python3.11-libs-0:3.11.2-2.el8_8.10.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-libs-0:3.11.2-2.el8_8.10.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-libs-0:3.11.2-2.el8_8.10.x86_64 as a component of Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • python3.11-rpm-macros-0:3.11.2-2.el8_8.10.noarch as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • python3.11-rpm-macros-0:3.11.2-2.el8_8.10.noarch as a component of Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • python3.11-tkinter-0:3.11.2-2.el8_8.10.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • +2 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: 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. 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 (5)