CVE-2024-45490: Libexpat Project Libexpat

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

An issue was discovered in libexpat before 2.6.3. xmlparse.c does not reject a negative length for XML_ParseBuffer.

Affected products

• Libexpat Project Libexpat: before 2.6.3 (fixed in 2.6.3)

Published 2024-08-30. Last modified 2026-06-17.