CVE-2026-4224 Affecting python3.12 package, versions <3.12.3-1ubuntu0.15


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.62% (45th percentile)

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  • Snyk IDSNYK-UBUNTU2404-PYTHON312-15689042
  • published6 Jul 2026
  • disclosed16 Mar 2026

Introduced: 16 Mar 2026

CVE-2026-4224  (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.

When an Expat parser with a registered ElementDeclHandler parses an inline document type definition containing a deeply nested content model a C stack overflow occurs.

CVSS Base Scores

version 3.1