CVE-2026-86138

medium

Description

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

References

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

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

Details

Source: Mitre, NVD

Published: 2026-09-05

Updated: 2026-09-05

Risk Information

CVSS v2

Base Score: 5.9

Vector: CVSS2#AV:L/AC:H/Au:N/C:C/I:C/A:P

Severity: Medium

CVSS v3

Base Score: 6.9

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

Severity: Medium

EPSS

EPSS: 0.0012