CVE-2025-69534 Affecting python3.12 package, versions <3.12.3-1ubuntu0.15


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.57% (43rd percentile)

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  • Snyk IDSNYK-UBUNTU2404-PYTHON312-15438436
  • published6 Jul 2026
  • disclosed5 Mar 2026

Introduced: 5 Mar 2026

CVE-2025-69534  (opens in a new tab)

How to fix?

Upgrade Ubuntu:24.04 python3.12 to version 3.12.3-1ubuntu0.15 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3.12 package and not the python3.12 package as distributed by Ubuntu. See How to fix? for Ubuntu:24.04 relevant fixed versions and status.

Python-Markdown version 3.8 contain a vulnerability where malformed HTML-like sequences can cause html.parser.HTMLParser to raise an unhandled AssertionError during Markdown parsing. Because Python-Markdown does not catch this exception, any application that processes attacker-controlled Markdown may crash. This enables remote, unauthenticated Denial of Service in web applications, documentation systems, CI/CD pipelines, and any service that renders untrusted Markdown. The issue was acknowledged by the vendor and fixed in version 3.8.1. This issue causes a remote Denial of Service in any application parsing untrusted Markdown, and can lead to Information Disclosure through uncaught exceptions.

CVSS Base Scores

version 3.1