CVE-2026-6653
criticalUse 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 malici…
Vendor / product: Xmlsoft — libxml2
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.
CVSS
9.8
9.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-06-22 14:17
Modified: 2026-10-25 23:10
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 07:07 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
xmlsoft / libxml2 ≥2.9.11 ≤2.11.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1058
References
- https://bugs.launchpad.net/ubuntu/+source/libxml2/+bug/2141260 security@ubuntu.com
- https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1058 security@ubuntu.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:07 UTC · record ↗