CVE-2026-44351

fast-jwt provides fast JSON Web Token JWT implementation. Prior to 6.2.4, a critical authentication-bypass vulnerability in fast-jwt's async key-resolver flow allows any unauthenticated attacker to forge arbitrary JWTs that are accepted as authentic. When the application's key resolver returns an...

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...