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VulnerabilityPublished Updated

CVE-2026-92899: Apache WSS4J · Incorrect Behavior Order: Validate Before Canonicalize

Affects Apache WSS4JSource CVE Database V5

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Not known to be exploited · CVSS 4.8 Medium · fixed in 4.0.2 : update Apache WSS4J when convenient.

Data as of 14 Nov 2026, 20:44 UTC

CVSS 3.1 base score
4.8Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CISA-ADPCVSS 3.14.8
EPSS
0.5% chance of exploitation in 30 days – higher than 43% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.0.2, 3.0.6, 2.4.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 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 14 Nov 2026.

What to do

Upgrade Apache WSS4J and org.apache.wss4j/wss4j-ws-security-dom to 4.0.2, 3.0.6 or 2.4.4.

Affected software

ProductAffectedFixed in
Apache WSS4Jorg.apache.wss4j:wss4j-ws-security-domAffected
  • >=4.0.0 <4.0.2
Fixed in
  • 4.0.2
Apache WSS4Jorg.apache.wss4j:wss4j-ws-security-domAffected
  • >=3.0.0 <3.0.6
Fixed in
  • 3.0.6
Apache WSS4Jorg.apache.wss4j:wss4j-ws-security-domAffected
  • <2.4.4
Fixed in
  • 2.4.4
Mavenorg.apache.wss4j/wss4j-ws-security-dompkg:maven/org.apache.wss4j/wss4j-ws-security-domOther threatsAffected
  • >=4.0.0 <4.0.2
  • >=3.0.0 <3.0.6
  • <2.4.4
Fixed in
  • 4.0.2
  • 3.0.6
  • 2.4.4

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 WSS4J to versions 4.0.2, 3.0.6, or 2.4.4 or later, where the nonce replay cache keys Nonce values on decoded bytes rather than raw base64 text, preventing this replay attack. No other mitigation is required once upgraded.

Description

Apache WSS4J versions prior to 4.0.2, 3.0.6, and 2.4.4 have a vulnerability in the handling of UsernameToken Nonce values. The system stored Nonce values as raw base64 text, but authentication uses decoded bytes, allowing an attacker to replay captured tokens by modifying the base64 encoding without changing the decoded value. This bypasses the nonce replay cache, enabling reuse of tokens until expiration. The issue affects deployments with nonce replay cache enabled and tokens using password digest authentication.

References

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