PT-2026-51247 · Libexpat+1 · Libexpat+1

·

CVE-2026-56411

·

Published

2026-06-21

·

Updated

2026-08-31

CVSS v3.1

6.9

Medium

VectorAV: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 endDoctypeDecl() function. This issue is triggered via NOTATION declarations, which are used in XML to define the format of non-XML data.
Recommendations Update to version 2.8.2 or later.

Exploit

Fix

DoS

Integer Overflow

Found an issue in the description? Have something to add? Feel free to write us 👾

Weakness Enumeration

Related Identifiers

AZL-90246
CVE-2026-56411
ECHO-77AE-CE5F-D255
OESA-2026-2973
OESA-2026-2974
OESA-2026-2975
OESA-2026-2976
OPENSUSE-SU-2026:11584-1

Affected Products

Ibm Aix
Libexpat