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CVE-2026-88920

Apache WSS4J: SAML Sender-Vouches Authentication Bypass

0Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Track
exploitation probability
—
observed exploitation
nono source reports it
An authentication bypass in the DOM security processor in Apache WSS4J allows unauthenticated remote attackers to forge authenticated SOAP messages via a crafted unsigned SAML sender-vouches assertion containing an attacker-controlled key. Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.