CVE-2026-91866
Received Received - Intake

Apache Neethi Policy Intersection Denial of Service

Publication date: 2026-09-21

Last updated on: 2026-09-21

Assigner: Apache Software Foundation

Description
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.

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Meta Information

Published
2026-09-21
Last Modified
2026-09-21
Generated
2026-09-21
AI Q&A
2026-09-21
EPSS Evaluated
N/A
NVD
CVE-2026-91866
EUVD
EUVD-2026-83888

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
apache neethi 3.2.4

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability involves a denial of service attack where specially crafted WS-Policy documents cause Neethi's policy-intersection function to consume excessive CPU resources, leading to system slowdowns or crashes.

Detection Guidance

Detecting this vulnerability requires checking the version of Apache Neethi installed on your system. If you are running a version before 3.2.4, your system is vulnerable. Use the following commands to check the installed version: For Maven projects, run 'mvn dependency:tree | grep neethi'. For systems with Neethi installed directly, run 'neethi --version' or check the JAR file metadata in the classpath.

Impact Analysis

The vulnerability can disrupt services by consuming CPU resources, causing delays or unavailability of applications relying on Neethi for policy processing. Users may experience degraded performance or system outages.

Compliance Impact

This vulnerability causes prolonged CPU usage and denial of service due to exponential work in policy processing. While not directly tied to data protection, such resource exhaustion could disrupt systems handling sensitive data, potentially impacting compliance with GDPR (availability requirements) or HIPAA (system integrity and availability).

Mitigation Strategies

Upgrade to Apache Neethi version 3.2.4 or later to address the vulnerability.

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