CVE-2026-6653
HIGHlibxml2: Use after free in xmlParseInternalSubset via improper entity resolution handling
Title source: cnaDescription
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.
References (2)
Core 2
Core References
Issue Tracking issue-tracking
https://bugs.launchpad.net/ubuntu/+source/libxml2/+bug/2141260
Issue Tracking issue-tracking
https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1058
Scores
CVSS v4
7.0
EPSS
0.0029
EPSS Percentile
20.8%
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-416
CWE-611
Status
published
Products (1)
GNOME/libxml2
2.9.11 - 2.11.0
Published
Jun 22, 2026
Tracked Since
Jun 22, 2026