Vulnerability/
https://seclists.org/oss-sec/2026/q3/657

https://seclists.org/oss-sec/2026/q3/657: Vulnerabilities fixed in libxml2-2.15.4

Q: Which libxml2 versions are affected?

The listed issues affect libxml2 versions before 2.15.4. Updating to 2.15.4 addresses the security fixes described in the source.

Q: Which CVEs have been assigned to the reported fixes?

CVE-2026-86137 covers an out-of-bounds read in xmlFAParsePosCharGroup. CVE-2026-86138 covers an integer overflow leading to a heap-based buffer overflow in xmlDictAddQString, CVE-2026-86139 covers an integer overflow in xmlURIEscapeStr, and CVE-2026-86140 is assigned to an issue in xmlSnprintfElements.

Published Sep 5, 2026

Updated

Affected Software

1 affected component

Gnome libxml2<2.15.4

Frequently Asked Questions

Which libxml2 versions are affected?

The listed issues affect libxml2 versions before 2.15.4. Updating to 2.15.4 addresses the security fixes described in the source.

Which CVEs have been assigned to the reported fixes?

CVE-2026-86137 covers an out-of-bounds read in xmlFAParsePosCharGroup. CVE-2026-86138 covers an integer overflow leading to a heap-based buffer overflow in xmlDictAddQString, CVE-2026-86139 covers an integer overflow in xmlURIEscapeStr, and CVE-2026-86140 is assigned to an issue in xmlSnprintfElements.

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