Advisories for Golang/Github.com/Dgrijalva/Jwt-Go/V4 package

2021

Improper Handling of Exceptional Conditions

jwt-go before 4.0.0-preview1 allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check.