CVE-2026-86138CWE-190

CVE-2026-86138

Medium · published September 5, 2026

CVSS v3.1
6.9
EPSS
0%
Percentile
2.0
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
6.9 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00120 · 2.0th percentile
Weakness
CWE-190 · Integer Overflow or Wraparound
Published
2026-09-05T09:17Z
References (2)
https://github.com/GNOME/libxml2/commit/a4cba4b5b5a8c42e155ed42d2d2a44955465a2e4 · [email protected]https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4 · [email protected]
EPSS history
Timeline
  • 06 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 05 SEP 04:21Z
    In libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow
    cvelistv5