What is CVE-2026-91863?

CVE-2026-91863 is a high-severity vulnerability in Apache Software Foundation Neethi, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-09-21.

How severe is CVE-2026-91863?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Apache Software Foundation Neethi

CVE-2026-91863

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.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Apache Software Foundation Neethi

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

References

security@apache.org (vendor-advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-91863?: CVE-2026-91863 is a high-severity vulnerability in Apache Software Foundation Neethi, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-09-21.
How severe is CVE-2026-91863?: High severity. CVSS v3 base score is 7.5 out of 10.