Authentication Bypass by Assumed-Immutable Data Affecting org.apache.wss4j:wss4j-ws-security-dom package, versions [,2.4.4)[3.0.0,3.0.6)[4.0.0,4.0.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-ORGAPACHEWSS4J-21716570
- published26 Oct 2026
- disclosed30 Sept 2026
- creditn0mi1k
Introduced: 30 Sep 2026
NewCVE-2026-88920 (opens in a new tab)How to fix?
Upgrade org.apache.wss4j:wss4j-ws-security-dom to version 2.4.4, 3.0.6, 4.0.2 or higher.
Overview
org.apache.wss4j:wss4j-ws-security-dom is a Web Services Security (WS-Security) library being developed at OASIS Web Services Security TC. WSS4J is a primarily a Java library that can be used to sign and verify SOAP Messages with WS-Security information. WSS4J will use Apache Axis and Apache XML-Security projects and will be interoperable with JAX-RPC based server/clients and .NET server/clients.
Affected versions of this package are vulnerable to Authentication Bypass by Assumed-Immutable Data via the createPrincipalFromSAML method in the DOM SignatureSTRParser. An unauthenticated remote attacker can forge authenticated SOAP messages by sending an unsigned SAML sender-vouches assertion with an attacker-controlled secret in its Subject KeyInfo: the parser returns that secret as the key used to verify the message’s signature, allowing the attacker to create a signature that validates with their own key. The forged messages can then be processed as authenticated.