PT-2026-51245 · Libexpat+1 · Libexpat+1

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CVE-2026-56409

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Published

2026-06-21

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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 tool contains an integer overflow related to the output filename when the -d outputDir option is utilized. An integer overflow occurs when a mathematical operation results in a value that exceeds the maximum size of the integer type used to store it, potentially leading to memory corruption or crashes.
Recommendations Update to version 2.8.2 or later.

Exploit

Fix

DoS

Integer Overflow

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Weakness Enumeration

Related Identifiers

AZL-90249
CVE-2026-56409
ECHO-E231-2B20-A715
OESA-2026-2973
OESA-2026-2974
OESA-2026-2975
OESA-2026-2976
OPENSUSE-SU-2026:11584-1

Affected Products

Ibm Aix
Libexpat