CVE-2026-15308 Affecting python3.10 package, versions <3.10.12-1~22.04.18


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.64% (48th percentile)

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  • Snyk IDSNYK-UBUNTU2204-PYTHON310-17940450
  • published11 Sept 2026
  • disclosed9 Jul 2026

Introduced: 9 Jul 2026

CVE-2026-15308  (opens in a new tab)

How to fix?

Upgrade Ubuntu:22.04 python3.10 to version 3.10.12-1~22.04.18 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3.10 package and not the python3.10 package as distributed by Ubuntu. See How to fix? for Ubuntu:22.04 relevant fixed versions and status.

The incremental HTML parser (html.parser.HTMLParser) allows for CPU denial-of-service through repeated unterminated markup declarations when processing uncontrolled data.

CVSS Base Scores

version 3.1