{"id":"CVE-2017-18239","details":"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.","aliases":["GHSA-3rhm-67j6-42jq"],"modified":"2026-03-15T21:53:33.587530Z","published":"2018-03-18T03:29:00.213Z","references":[{"type":"REPORT","url":"https://github.com/jasongoodwin/authentikat-jwt/issues/12"},{"type":"REPORT","url":"https://github.com/jasongoodwin/authentikat-jwt/pull/36"},{"type":"FIX","url":"https://github.com/jasongoodwin/authentikat-jwt/commit/2d2fa0d40ac8f2f7aa7e9b070fa1a25eee082cb0"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/jasongoodwin/authentikat-jwt","events":[{"introduced":"0"},{"fixed":"2d2fa0d40ac8f2f7aa7e9b070fa1a25eee082cb0"}]},{"type":"GIT","repo":"https://github.com/jasongoodwin/authentikat-jwt","events":[{"introduced":"0"},{"fixed":"2d2fa0d40ac8f2f7aa7e9b070fa1a25eee082cb0"}]}],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"0.4.5"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-18239.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}