CVE-2026-18500

@fastify/jwt is a JSON Web Token plugin for Fastify. In versions before 10.2.2, a per-request verification key passed to request.jwtVerify key is silently overridden by the plugin's globally configured secret, because the option merge applies the global key last. Applications that use different...

CVE-2026-18500 @fastify/jwt vulnerable to authorization bypass via global secret overriding the per-request key

@fastify/jwt is a JSON Web Token plugin for Fastify. In versions before 10.2.2, a per-request verification key passed to request.jwtVerify key is silently overridden by the plugin's globally configured secret, because the option merge applies the global key last. Applications that use different...

CVE-2026-18500 @fastify/jwt vulnerable to authorization bypass via global secret overriding the per-request key

@fastify/jwt is a JSON Web Token plugin for Fastify. In versions before 10.2.2, a per-request verification key passed to request.jwtVerify key is silently overridden by the plugin's globally configured secret, because the option merge applies the global key last. Applications that use different...

CVE-2026-18500

CVE-2026-18500 concerns the @fastify/jwt plugin for Fastify. In versions before 10.2.2, a per-request key passed to request.jwtVerify({ key }) can be silently overridden by the plugin’s globally configured secret due to the option merge applying the global key last. This allows an ordinary authen...