{"id":"CVE-2017-18239","aliases":["EUVD-2018-0729","GHSA-3rhm-67j6-42jq"],"status":"published","title":"Exposure of Sensitive information in authentikat-jwt","description":"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.","severity":{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.01963,"percentile":0.80455,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2018-03-18T03:00:00Z","modified":"2026-10-20T10:48:30Z","fixes":[{"ecosystem":"Maven","package":"com.jason-goodwin:authentikat-jwt_2.12","fixed_in":["0.4.6"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"com.jason-goodwin:authentikat-jwt_2.12","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.4.5"},{"fixed":"0.4.6"}]}]},{"source":"osv","ecosystem":"Maven","package":"com.jason-goodwin:authentikat-jwt_2.12","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.6"}]}],"versions":["0.4.4","0.4.5"]}],"products":[{"vendor":"authentikat-jwt_project","product":"authentikat-jwt"}],"references":[{"url":"https://github.com/jasongoodwin/authentikat-jwt/commit/2d2fa0d40ac8f2f7aa7e9b070fa1a25eee082cb0","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/jasongoodwin/authentikat-jwt/issues/12","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://github.com/jasongoodwin/authentikat-jwt/pull/36","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18239","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-3rhm-67j6-42jq","tags":["advisory"]},{"url":"https://github.com/jasongoodwin/authentikat-jwt","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2017-18239","description":"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.","status":"published","published":"2018-03-18T03:00:00Z","modified":"2024-08-05T21:13:49.152Z","updated_at":"2026-11-02T14:33:22.064284Z"}],"euvd":[{"id":"EUVD-2018-0729","description":"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.","status":"published","published":"2018-03-18T03:00:00Z","modified":"2024-08-05T21:13:49Z","updated_at":"2026-11-03T02:23:07.063551Z"}],"ghsa":[{"id":"GHSA-3rhm-67j6-42jq","title":"Exposure of Sensitive information in authentikat-jwt","description":"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.","status":"published","published":"2018-11-09T17:50:40Z","modified":"2023-01-09T05:03:56Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T14:36:07.581563Z"}],"nvd":[{"id":"CVE-2017-18239","description":"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.","status":"published","published":"2018-03-18T03:29:00.213Z","modified":"2026-06-17T01:12:27.637Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:04:17.032862Z"}],"osv":[{"id":"CVE-2017-18239","description":"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.","status":"published","published":"2018-03-18T03:29:00.213Z","modified":"2026-10-20T10:48:30.033763781Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:05.486486Z"},{"id":"GHSA-3rhm-67j6-42jq","title":"Exposure of Sensitive information in authentikat-jwt","description":"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.","status":"published","published":"2018-11-09T17:50:40Z","modified":"2024-12-02T05:49:07.423751Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:46:36.092962Z"}]}}