CVE-2026-86140

EUVD-2026-71833
In libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
mitreCNA
8 HIGH
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 3.31%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
xmlsoftlibxml2
𝑥
< 2.15.4
CNA
Debian logo
Debian Releases
Debian Product
Codename
libxml2
bookworm
vulnerable
bookworm (security)
vulnerable
forky
vulnerable
sid
2.15.4+dfsg-1
fixed
trixie
vulnerable
trixie (security)
vulnerable
Common Weakness Enumeration
References
https://github.com/GNOME/libxml2/commit/d1686f91dbda141a752200419d35639fd6b38340
https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4