CVE-2026-86141 Null dereference in libxml2
A NULL pointer dereference in libxml2 allows attackers to cause a denial of service via crafted XML input.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-86141?
CVE-2026-86141 is a low-severity vulnerability in Xmlsoft Libxml2, published on 5 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-252
Which versions are affected by CVE-2026-86141?
It affects 1 product.
Products include Xmlsoft Libxml2.
How do I fix CVE-2026-86141?
Upgrade to a fixed version.
Is CVE-2026-86141 being exploited?
There is no known exploitation of CVE-2026-86141 in the wild and no public exploit code.
Other vulnerabilities in Xmlsoft Libxml2
Sources
Also known as AZL-99708, DEBIAN-CVE-2026-86141, ECHO-65ff-653b-67a3, GHSA-7g6w-jj32-qj92.