CVE-2026-86140CWE-121

CVE-2026-86140

High · published September 5, 2026

CVSS v3.1
8.0
EPSS
0%
Percentile
4.5
In the wild
Unconfirmed
What it is

In libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow.

The record
Technical detail
CVSS v3.1
8.0 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00157 · 4.5th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-09-05T09:17Z
Affected products (1)
ProductVersionsFixed in
xmlsoft/libxml2< 2.15.42.15.4
References (2)
https://github.com/GNOME/libxml2/commit/d1686f91dbda141a752200419d35639fd6b38340 · [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 04:26Z
    In libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow
    cvelistv5