CVE-2026-91866: Apache Neethi

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

A specially crafted pair of WS-Policy documents can force Neethi's policy-intersection to do exponential amounts of work, pinning the CPU for a long time (denial of service). Users are recommended to upgrade to version 3.2.4, which fixes this issue.

Affected products

• Apache Neethi: before 3.2.4 (fixed in 3.2.4)

Published 2026-09-21. Last modified 2026-09-25.