CVE-2026-6653
9.8
CRITICAL
CVSS 3.1
EPSS 0.35%
Description
Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote attacker to cause a denial-of-service via maliciously crafted XML input with improper entity resolution handling.
How to fix CVE-2026-6653
No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.
- Debian/libxml2—no fix listed
Is CVE-2026-6653 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |