CVE-2026-23552

Cross-Realm Token Acceptance Bypass in KeycloakSecurityPolicy Apache Camel Keycloak component. The Camel-Keycloak KeycloakSecurityPolicy does not validate the iss issuer claim of JWT tokens against the configured realm. A token issued by one Keycloak realm is silently accepted by a policy...

CVE-2025-30144 Fast-JWT Improperly Validates iss Claims

fast-jwt provides fast JSON Web Token JWT implementation. Prior to 5.0.6, the fast-jwt library does not properly validate the iss claim based on the RFC 7519. The iss issuer claim validation within the fast-jwt library permits an array of strings as a valid iss value. This design flaw enables a...

Jenkins OpenId Connect Authentication Plugin lacks issuer claim validation

Jenkins OpenId Connect Authentication Plugin 4.354.v321ce67a1de8 and earlier does not check the iss Issuer claim of an ID Token during its authentication flow, a value that identifies the Originating Party IdP. This vulnerability may allow attackers to subvert the authentication flow, potentially...