CVE-2026-91863: Apache Neethi

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

A specially crafted WS-Policy document with deeply nested policy elements can bypass Neethi's nesting-depth limit and exhaust the thread stack, crashing the parser (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 2026-09-24.