Description
libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219.
References (1)
Core 1
Core References
Scores
CVSS v3
4.9
EPSS
0.0014
EPSS Percentile
3.6%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-416
Status
published
Products (2)
libexpat project/libexpat
< 2.8.2
libexpat_project/libexpat
< 2.8.2
Published
Jun 21, 2026
Tracked Since
Jun 21, 2026