PT-2026-51246 · Libexpat · Libexpat

Netliomax25-Code · Published 2026-06-21 · Updated 2026-06-21 · CVE-2026-56410

Positive Technologies (AI Summary)

CVSS v3.1

6.9

Medium

Base vector

AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

Name of the Vulnerable Software and Affected Versions libexpat versions prior to 2.8.2

Description The xmlwf component contains an integer overflow in the resolveSystemId() function. An integer overflow occurs when an arithmetic operation results in a value that exceeds the maximum size of the integer type used to store it.

Recommendations Update to version 2.8.2 or later.

Fix

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

CVE-2026-56410

Affected Products

Libexpat

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-56410 · Security Note
• https://github.com/libexpat/libexpat/pull/1252 · Note
• https://twitter.com/CVEnew/status/2068747017879159001 · Twitter Post