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Use of a Broken or Risky Cryptographic Algorithm


Severity High
Score 7.6/10


Versions prior to 9.0.0 of `jsonwebtoken` library, lack of algorithm definition in the `jwt.verify()` function can lead to signature validation bypass due to defaulting to the `none` algorithm for signature verification. Users are affected if you do not specify algorithms in the `jwt.verify()` function. This issue has been fixed, which removes the default support for the none algorithm in the `jwt.verify()` method and you don’t need to allow for the `none` algorithm. If you need 'none' algorithm, you have to explicitly specify that in `jwt.verify()` options.

  • LOW
  • HIGH
  • NONE
  • LOW
  • LOW
  • LOW

CWE-327 - Use of a Broken or Risky Cryptographic Algorithm

The use of a broken or risky cryptographic algorithm is an unnecessary risk that may result in the exposure of sensitive information.

Advisory Timeline

  • Published