CVE-2026-0989: Libxml2: unbounded relaxng include recursion leading to stack overflow

Overview

Severity

Low (CVSS 3.7)

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploit Status

Not Exploited

Patch Tuesday

2026-Aug

Released

2026-01-19

Last Updated

2026-08-07

EPSS Score

0.44% (percentile: 36.1%)

Affected Products (8)

Open Source Software

• cbl2 libxml2 2.10.4-9 on CBL Mariner 2.0
• azl3 libxml2 2.11.5-8 on Azure Linux 3.0
• cbl2 libxml2 2.10.4-10 on CBL Mariner 2.0
• azl3 libxml2 2.11.5-9 on Azure Linux 3.0
• cbl2 libxml2 2.10.4-11
• azl3 libxml2 2.11.5-7 on Azure Linux 3.0
• cbl2 libxml2 2.10.4-11 on CBL Mariner 2.0
• azl3 libxml2 2.11.5-10 on Azure Linux 3.0

Revision History

• 2026-01-19: Information published.
• 2026-01-19: Information published.
• 2026-01-20: Information published.
• 2026-02-18: Information published.
• 2026-03-03: Information published.
• 2026-03-04: Information published.
• 2026-06-18: Information published.
• 2026-06-28: Information published.
• 2026-08-07: Information published.