RHSA-2026:20674HighCVSS 8.2

Red Hat Security Advisory: python-markdown security update

Published
May 26, 2026
Last Modified
October 2, 2026

🔗 CVE IDs covered (1)

CVE-2025-69534 →

📋 Description

CVE-2025-69534 — python-markdown: denial of service via malformed HTML-like sequences

🎯 Affected products3

  • Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • python-markdown-0:3.3.4-4.el9_4.2.src as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • python3-markdown-0:3.3.4-4.el9_4.2.noarch as a component of Red Hat Enterprise Linux BaseOS EUS (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: To mitigate this vulnerability, wrap your markdown parsing function in a try/except block. This catches the unhandled exception, preventing both the application crash and the stack trace leak.

🔗 References (4)