CVE-2026-4224: Stack overflow parsing XML with deeply nested DTD content models
Overview
- Severity
- High (CVSS 7.5)
- CVSS Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Exploit Status
- Not Exploited
- Patch Tuesday
- 2026-Mar
- Released
- 2026-03-19
- Last Updated
- 2026-08-23
- EPSS Score
- 0.69% (percentile: 50.9%)
Affected Products (7)
Open Source Software
- azl3 python3 3.12.9-9 on Azure Linux 3.0
- cbl2 python3 3.9.19-19 on CBL Mariner 2.0
- azl3 python3 3.12.9-10 on Azure Linux 3.0
Other
- 21492-17084
- 21379-17084
- 20937
- 21694-17084
Revision History
- 2026-03-19: Information published.
- 2026-03-19: Information published.
- 2026-03-31: Information published.
- 2026-04-13: Information published.
- 2026-06-03: Information published.
- 2026-06-28: Information published.
- 2026-08-07: Information published.
- 2026-08-10: Information published.
- 2026-08-23: Information published.