CVE-2025-6069 Affecting python39:3.9/python39-pyyaml package, versions <0:5.4.1-1.module_el8.6.0+3248+c431e88c


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.6% (49th percentile)

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  • Snyk IDSNYK-ALMALINUX8-PYTHON39-14551702
  • published23 Dec 2025
  • disclosed16 Dec 2025

Introduced: 16 Dec 2025

CVE-2025-6069  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 python39:3.9/python39-pyyaml to version 0:5.4.1-1.module_el8.6.0+3248+c431e88c or higher.
This issue was patched in ALSA-2025:23530.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python39:3.9/python39-pyyaml package and not the python39:3.9/python39-pyyaml package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service.

CVSS Base Scores

version 3.1