CVE-2026-25210

MEDIUM

libexpat < 2.7.4 - Integer Overflow in Tag Buffer Reallocation

Title source: llm
STIX 2.1

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.

References (3)

Core 3

Scores

CVSS v3 6.9
EPSS 0.0019
EPSS Percentile 8.4%
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