CVE-2026-91864: neethi DoS — Fix

Description

A specially crafted WS-Policy document can pack unlimited content inside a policy assertion, which Neethi copies into memory without counting it against its size limits, exhausting the heap (denial of service). Users are recommended to upgrade to version 3.2.4, which fixes this issue.

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CVSS v3.1 Score

7.5

HIGH

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

EPSS — Exploit Prediction

0.0074

Probability of exploitation

0.53%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-770 CWE-770

Affected Products

Vendor	Product	Versions
apache	neethi	< 3.2.4

References

Advisories & Patches

https://lists.apache.org/thread/400kbynbyhqhsjkv1yz251jm9wdz8z69

Other References

http://www.openwall.com/lists/oss-security/2026/09/18/11

Frequently Asked Questions

What is CVE-2026-91864? +

A specially crafted WS-Policy document can pack unlimited content inside a policy assertion, which Neethi copies into memory without counting it against its size limits, exhausting the heap (denial of service). Users are recommended to upgrade to version 3.2.4, which fixes this issue. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-91864? +

CVE-2026-91864 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0074, placing it in the 1th percentile for exploitation probability.

What products are affected by CVE-2026-91864? +

CVE-2026-91864 affects products from apache, specifically: neethi. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-91864? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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