CVE-2017-18239 (authentikat-jwt)
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A time-sensitive equality check on the JWT signature in the JsonWebToken.validate method in main/scala/authentikat/jwt/JsonWebToken.scala in authentikat-jwt (aka com.jason-goodwin/authentikat-jwt) version 0.4.5 and earlier allows the supplier of a JWT token to guess bit after bit of the signature by repeating validation requests.
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-18239
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