CVE-2026-6653
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductXmlsoft Libxml2
PublishedJun 22, 2026
First seenJun 22, 2026
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| xmlsoft libxml2 | 2.9.11 ≤ v ≤ 2.11.0 | — |
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