CVE-2025-59375: Libexpat Project Libexpat

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.

Affected products

• Libexpat Project Libexpat: before 2.7.2 (fixed in 2.7.2)

Published 2025-09-15. Last modified 2026-06-17.