CVE-2026-76956: Libexpat Project Libexpat

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, which results in being vulnerable to hash flooding attacks, causing a denial of service via crafted XML content.

Affected products

Published 2026-08-20. Last modified 2026-09-08.