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VulnerabilityPublished

CVE-2026-91866: Apache Neethi · Unthrottled Resource Allocation

Affects Apache NeethiSource CVE Database V5

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Not known to be exploited · CVSS 7.5 High : upgrade to 3.2.4 soon.

Data as of 5 Nov 2026, 23:24 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.7% chance of exploitation in 30 days – higher than 54% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 3.2.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 21 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Upgrade Apache to 3.2.4.

Affected software

ProductAffectedFixed in
Apache Software FoundationApache NeethiAffected
  • <3.2.4
Fixed in
  • 3.2.4
MavenApache Software Foundation/org.apache.neethi:neethipkg:maven/Apache Software Foundation/org.apache.neethi:neethiOther threatsAffected
  • <3.2.4
Fixed in
  • 3.2.4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should upgrade Apache Neethi to version 3.2.4 or later to remediate this vulnerability. No other mitigations are indicated.

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.

References

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