CVE-2026-86138

Published: Sep 5, 2026Modified: Sep 15, 2026

7.8

Vector

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

Exploitability: 1.8 / Impact: 5.9

Source: NVD

Description

In libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow.

Affected (1)

Products: Xmlsoft: Libxml2

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Xmlsoft Libxml2	version < 2.15.4

Related CWEs

Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

References (2)

https://github.com/GNOME/libxml2/commit/a4cba4b5b5a8c42e155ed42d2d2a44955465a2e4

Source: cve@mitre.org

Patch

https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4

Source: cve@mitre.org

Release Notes

Timeline

No history available yet.