CVE-2026-4224: Stack overflow parsing XML with deeply nested DTD content models

Overview

Severity

N/A

Exploit Status

Not Exploited

Patch Tuesday

2026-Mar

Released

2026-03-19

Last Updated

2026-04-13

EPSS Score

0.03% (percentile: 10.1%)

Affected Products (3)

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

Revision History

• 2026-03-19: Information published.
• 2026-03-19: Information published.
• 2026-03-31: Information published.
• 2026-04-13: Information published.