Insufficient Session Expiration

Overview fast-jwt is a Fast JSON Web Token implementation Affected versions of this package are vulnerable to Insufficient Session Expiration via the verifier cache in src/verifier.js, where the cacheSet function only derived exp and nbf bounds from a token's payload when the iat claim was also...

NPM: fast-jwt clockTolerance: Infinity silently bypasses both exp and nbf validation (and persists in the verifier cache)

NPM: fast-jwt clockTolerance: Infinity silently bypasses both exp and nbf validation and persists in the verifier cache vulnerability discovered by ? in WordPress Npm fast-jwt versions = 6.2.4...

fast-jwt clockTolerance: Infinity silently bypasses both exp and nbf validation (and persists in the verifier cache)

Summary createVerifier clockTolerance: Infinity silently bypasses both exp expiry AND nbf not-before validation. Any expired or not-yet-active token is accepted as valid. The same primitive also corrupts the verifier's internal cache so cached entries inherit infinite validity — they remain valid...

CVE-2026-107721 fast-jwt clockTolerance: Infinity silently bypasses both exp and nbf validation (and persists in the verifier cache)

fast-jwt provides fast JSON Web Token JWT implementation. Prior to 6.3.0, fast-jwt createVerifier accepts Infinity for clockTolerance because its option validation checks type and negativity but not finiteness. In validateClaimDateValue, infinite positive and negative modifiers make exp and nbf...

CVE-2026-107721 fast-jwt clockTolerance: Infinity silently bypasses both exp and nbf validation (and persists in the verifier cache)

fast-jwt provides fast JSON Web Token JWT implementation. Prior to 6.3.0, fast-jwt createVerifier accepts Infinity for clockTolerance because its option validation checks type and negativity but not finiteness. In validateClaimDateValue, infinite positive and negative modifiers make exp and nbf...

CVE-2026-107721

The fast-jwt library, prior to version 6.3.0 , contains a vulnerability where setting clockTolerance to Infinity bypasses both exp (expiration) and nbf (not before) validations. This occurs because the createVerifier function fails to check for finiteness during option validation. Consequently, t...

CVE-2026-107721

fast-jwt provides fast JSON Web Token JWT implementation. Prior to 6.3.0, fast-jwt createVerifier accepts Infinity for clockTolerance because its option validation checks type and negativity but not finiteness. In validateClaimDateValue, infinite positive and negative modifiers make exp and nbf...

CVE-2026-107721 fast-jwt clockTolerance: Infinity silently bypasses both exp and nbf validation (and persists in the verifier cache)

fast-jwt provides fast JSON Web Token JWT implementation. Prior to 6.3.0, fast-jwt createVerifier accepts Infinity for clockTolerance because its option validation checks type and negativity but not finiteness. In validateClaimDateValue, infinite positive and negative modifiers make exp and nbf...

CVE-2026-107719 fast-jwt: Verifier cache accepts expired JWTs without iat.

fast-jwt provides fast JSON Web Token JWT implementation. Prior to 6.3.4, the fast-jwt createVerifier cache can continue accepting a previously valid, signed JWT after its exp time when caching is enabled and the token has exp but no iat. In src/verifier.js, cacheSet derives the exp cache deadlin...

CVE-2026-107719

The fast-jwt library (prior to version 6.3.4 ) contains a vulnerability in its createVerifier cache. When caching is enabled, the system may continue to accept a signed JWT after its exp time if the token lacks an iat claim. This occurs because src/verifier.js only derives the expiration deadline...

CVE-2026-107719 fast-jwt: Verifier cache accepts expired JWTs without iat.

fast-jwt provides fast JSON Web Token JWT implementation. Prior to 6.3.4, the fast-jwt createVerifier cache can continue accepting a previously valid, signed JWT after its exp time when caching is enabled and the token has exp but no iat. In src/verifier.js, cacheSet derives the exp cache deadlin...

Oracle Java Runtime Bytecode Verifier Cache Code Execution (CVE-2012-1723)

An input validation error vulnerability has been reported in Oracle Java Runtime JRE. The vulnerability is due to a type confusion error. A remote attacker can exploit this issue by enticing a target user to open a specially crafted web page containing a Java applet or running a Java Archive JAR...