NULL pointer dereference in Libxml2 - CVE-2026-86141
Published: September 8, 2026
Vulnerability identifier: #VU147359
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-86141
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in xmlRegNewParserCtxt in xmlregexp when a strdup failure occurs. A remote attacker can trigger parser-context creation to cause a denial of service.
Exploitation requires a strdup failure.
Affected software
Libxml2
How to mitigate CVE-2026-86141
Install security update from vendor's website.
Libxml2 - update to 2.15.4