CVE-2026-45186

PoC —

CVSS 3.1

7.5 high

EPSS

<1%p39

Published

May 10, 2026 (May 10, 2026)

Modified

Aug 25, 2026

Description

In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.

Vendors: libexpat project
Products: libexpat
Weakness: CWE-407
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.5%)

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