RHSA-2026:10950HighCVSS 8.1

Red Hat Security Advisory: python3.12 security update

Published
April 27, 2026
Last Modified
August 10, 2026

🔗 CVE IDs covered (11)

CVE-2026-2297 →CVE-2026-4224 →CVE-2026-6100 →CVE-2025-6075 →CVE-2025-15282 →CVE-2026-1502 →CVE-2026-3644 →CVE-2026-4786 →CVE-2025-13837 →CVE-2025-59375 →CVE-2026-0672 →

📋 Description

CVE-2025-6075 — python: Quadratic complexity in os.path.expandvars() with user-controlled template CVE-2025-13837 — cpython: Out-of-memory when loading Plist CVE-2025-15282 — cpython: Header injection via newlines in data URL mediatype in Python CVE-2025-59375 — firefox: thunderbird: expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing CVE-2026-0672 — cpython: Header injection in http.cookies.Morsel in Python CVE-2026-1502 — python: Python: HTTP header injection via CR/LF in proxy tunnel headers CVE-2026-2297 — cpython: CPython: Logging Bypass in Legacy .pyc File Handling CVE-2026-3644 — cpython: Incomplete control character validation in http.cookies CVE-2026-4224 — cpython: Stack overflow parsing XML with deeply nested DTD content models 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 products59

  • Red Hat Enterprise Linux AppStream (v. 8)
  • Red Hat Enterprise Linux CRB (v. 8)
  • python3.12-0:3.12.13-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • python3.12-0:3.12.13-2.el8_10.i686 as a component of Red Hat Enterprise Linux CRB (v. 8)
  • python3.12-0:3.12.13-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • python3.12-0:3.12.13-2.el8_10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • python3.12-0:3.12.13-2.el8_10.src as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • python3.12-0:3.12.13-2.el8_10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • python3.12-debug-0:3.12.13-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux CRB (v. 8)
  • python3.12-debug-0:3.12.13-2.el8_10.i686 as a component of Red Hat Enterprise Linux CRB (v. 8)
  • python3.12-debug-0:3.12.13-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux CRB (v. 8)
  • python3.12-debug-0:3.12.13-2.el8_10.s390x as a component of Red Hat Enterprise Linux CRB (v. 8)
  • python3.12-debug-0:3.12.13-2.el8_10.x86_64 as a component of Red Hat Enterprise Linux CRB (v. 8)
  • python3.12-debuginfo-0:3.12.13-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • python3.12-debuginfo-0:3.12.13-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux CRB (v. 8)
  • python3.12-debuginfo-0:3.12.13-2.el8_10.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • python3.12-debuginfo-0:3.12.13-2.el8_10.i686 as a component of Red Hat Enterprise Linux CRB (v. 8)
  • python3.12-debuginfo-0:3.12.13-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • python3.12-debuginfo-0:3.12.13-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux CRB (v. 8)
  • python3.12-debuginfo-0:3.12.13-2.el8_10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • python3.12-debuginfo-0:3.12.13-2.el8_10.s390x as a component of Red Hat Enterprise Linux CRB (v. 8)
  • python3.12-debuginfo-0:3.12.13-2.el8_10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • python3.12-debuginfo-0:3.12.13-2.el8_10.x86_64 as a component of Red Hat Enterprise Linux CRB (v. 8)
  • python3.12-debugsource-0:3.12.13-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • python3.12-debugsource-0:3.12.13-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux CRB (v. 8)
  • python3.12-debugsource-0:3.12.13-2.el8_10.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • python3.12-debugsource-0:3.12.13-2.el8_10.i686 as a component of Red Hat Enterprise Linux CRB (v. 8)
  • python3.12-debugsource-0:3.12.13-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • python3.12-debugsource-0:3.12.13-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux CRB (v. 8)
  • python3.12-debugsource-0:3.12.13-2.el8_10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • +29 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: No mitigation is currently available that meets Red Hat Product Security’s standards for usability, deployment, applicability, 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. Workaround: To mitigate the issue, limit XML input size and complexity before parsing, and avoid accepting compressed or deeply nested XML. Use OS-level resource controls (like ulimit or setrlimit()) to cap memory usage, or run the parser in a sandboxed or isolated process with strict memory and CPU limits. This helps prevent denial-of-service by containing excessive resource consumption. 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 (14)