After logging in, users receive a JWT (JSON Web Token) as an authentication cookie, consisting
of the following three parts encoded in Base64:
Header
Payload
Signature
If a weak secret key is used, particularly with HS256 (HMAC with SHA-256) as the algorithm
for token signing, an attacker could potentially brute force it. This vulnerability arises
specifically due to the characteristics of HS256, and it's important to note that this scenario is
not applicable to algorithms like RS (RSA) where a different set of security considerations come
into play.
After logging in, users receive a JWT (JSON Web Token) as an authentication cookie, consisting of the following three parts encoded in Base64:
If a weak secret key is used, particularly with HS256 (HMAC with SHA-256) as the algorithm for token signing, an attacker could potentially brute force it. This vulnerability arises specifically due to the characteristics of HS256, and it's important to note that this scenario is not applicable to algorithms like RS (RSA) where a different set of security considerations come into play.