CVE-2026-91863

⚠️ high

Summary

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 Score

7.5

High

EPSS Score

0.5

Exploit Probability

Published Date

2026-09-21

First Seen: 2026-09-24

📊 Relative Risk Intelligence

This CVE is Moderate Risk - more severe than 67.7% of all 361,628 vulnerabilities in our database.

#116,659

Above average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Sep 21, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

YES

Can be exploited automatically

💥 Technical Impact

Partial

Limited system impact

🏆 Discovered By

This issue was found using Claude agents to study the security of open-source projects

SSVC data provided by CISA

Last Modified 2026-09-24

Source NVD 🔗

CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE IDs (Weakness Types)

CWE-674

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
apache	neethi	Affected	< 3.2.4

🔗 References 2

https://lists.apache.org/thread/72kxj71lvrqqx90xxqqc...

Mailing List Vendor Advisory

http://www.openwall.com/lists/oss-security/2026/09/1...

Mailing List Third Party Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-66142	⚠️ high	7.5	0.5	Apache Neethi is vulnerable to uncontrolled recursion when parsing policies that lack policy Ids or with deeply nested s...	2026-07-24
CVE-2026-66143	⚠️ high	7.5	0.5	It is possible to bypass the maximum number of normalized policy alternatives that was introduced in Apache Neethi 3.2....	2026-07-24
CVE-2026-66144	⚠️ high	7.5	0.5	Although remote policy references are not retrieved during policy normalization, if they are manually retrieved via the ...	2026-07-24
CVE-2026-42402	⚠️ high	7.5	0.0	Apache Neethi is vulnerable to a Denial of Service attack through algorithmic complexity in policy normalization. Specia...	2026-05-01
CVE-2026-42403	⚠️ high	7.5	0.0	Apache Neethi does not properly detect circular references in policy definitions. When a WS-Policy document contains cir...	2026-05-01
CVE-2026-42404	🔶 medium	6.5	0.0	Apache Neethi does not impose any restrictions on URIs when manually fetching remote policy references through the Polic...	2026-05-01

These CVEs affect the same products