CVE-2026-86141: Xmlsoft LIBXML2

Low severity, CVSS 3.3. EPSS: 0.2% chance of exploitation in the next 30 days.

xmlregexp in libxml2 before 2.15.4 has a NULL pointer dereference in xmlRegNewParserCtxt after a strdup failure, i.e., it does not calculate a string length after NULL checking.

Affected products

• Xmlsoft LIBXML2: before 2.15.4 (fixed in 2.15.4)

Published 2026-09-05. Last modified 2026-09-15.