CVE-2026-86140

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

Published Sep 5, 2026
CVSS 7.8 high
0.2% chance of exploitation in the next 30 days (EPSS)
A fix is available

Affected software

xmlsoft libxml2

CVE-2026-86140 at the National Vulnerability Database