Description
In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is no integer overflow check for tag buffer reallocation.
Scores
CVSS v3
6.9
EPSS
0.0001
EPSS Percentile
0.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-190
Status
published
Products (2)
libexpat project/libexpat
< 2.7.4
libexpat_project/libexpat
< 2.7.4
Published
Jan 30, 2026
Tracked Since
Feb 18, 2026