Uncontrolled Recursion in Apache Neethi - CVE-2026-91863
Published: September 21, 2026
Vulnerability identifier: #VU151526
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-91863
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled recursion in the Apache Neethi WS-Policy parser when parsing a crafted WS-Policy document with deeply nested policy elements. A remote attacker can supply a specially crafted WS-Policy document to exhaust the thread stack and crash the parser.
Affected software
Apache Neethi
How to mitigate CVE-2026-91863
Install security update from vendor's website.
Apache Neethi - update to 3.2.4