CVE-2026-82465

pac4j-saml before 6.5.6 does not require signature validation of SAML LogoutRequest messages in SAML2LogoutValidator.validateLogoutRequest. When an IdP sends no SessionIndex, a session can be destroyed based solely on the NameID, allowing an unauthenticated attacker to submit an unsigned...

CVE-2026-82465

pac4j-saml versions before 6.5.6 fail to enforce signature validation on SAML LogoutRequest messages in SAML2LogoutValidator.validateLogoutRequest(). When an IdP does not send a SessionIndex, the session can be destroyed based solely on the NameID. This allows an unauthenticated attacker to submi...

CVE-2026-82465 pac4j-saml before 6.5.6 Session Destruction via Unsigned LogoutRequest

pac4j-saml before 6.5.6 does not require signature validation of SAML LogoutRequest messages in SAML2LogoutValidator.validateLogoutRequest. When an IdP sends no SessionIndex, a session can be destroyed based solely on the NameID, allowing an unauthenticated attacker to submit an unsigned...

GHSA-WW38-37G9-M3Q3 Spring Security SAML2 Service Provider: Decryption Oracle Vulnerability from Unsigned SAML Response and Logout Payloads

Since Spring Security SAML decrypts SAML Responses as well as elements of SAML LogoutRequests and LogoutResponses without requiring a valid signature, attackers may be able to craft these SAML payloads and use the Service Provider as a decryption oracle. Affected versions: Spring Security 5.7.0...