{"id":"CVE-2020-36564","aliases":["EUVD-2022-7521","GHSA-5x84-q523-vvwr","GO-2020-0049"],"status":"published","title":"Improper input validation in github.com/justinas/nosurf","description":"Due to improper validation of caller input, validation is silently disabled if the provided expected token is malformed, causing any user supplied token to be considered valid.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00783,"percentile":0.56467,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2021-04-14T20:04:52Z","modified":"2026-10-20T10:54:21Z","fixes":[{"ecosystem":"Go","package":"github.com/justinas/nosurf","fixed_in":["1.1.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/justinas/nosurf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/justinas/nosurf","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.1.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/justinas/nosurf","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.1.1"}]}]}],"products":[{"vendor":"github.com/justinas/nosurf","product":"github.com/justinas/nosurf"},{"vendor":"nosurf_project","product":"nosurf"}],"references":[{"url":"https://github.com/justinas/nosurf/pull/60","tags":["x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/justinas/nosurf/commit/4d86df7a4affa1fa50ab39fb09aac56c3ce9c314","tags":["x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://pkg.go.dev/vuln/GO-2020-0049","tags":["x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-36564","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-5x84-q523-vvwr"},{"url":"https://github.com/justinas/nosurf","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2020-36564","title":"Improper input validation in github.com/justinas/nosurf","description":"Due to improper validation of caller input, validation is silently disabled if the provided expected token is malformed, causing any user supplied token to be considered 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token to be considered valid.","status":"published","published":"2022-12-28T00:30:23Z","modified":"2023-02-03T05:01:32Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:36:41.247728Z"}],"nvd":[{"id":"CVE-2020-36564","description":"Due to improper validation of caller input, validation is silently disabled if the provided expected token is malformed, causing any user supplied token to be considered valid.","status":"published","published":"2022-12-27T22:15:11.673Z","modified":"2026-06-17T03:15:44.917Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:06:47.286386Z"}],"osv":[{"id":"CVE-2020-36564","description":"Due to improper 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valid.","status":"published","published":"2022-12-28T00:30:23Z","modified":"2023-11-08T04:03:47.666515Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:46:38.911014Z"},{"id":"GO-2020-0049","title":"Improper input validation in github.com/justinas/nosurf","description":"Due to improper validation of caller input, validation is silently disabled if the provided expected token is malformed, causing any user supplied token to be considered valid.","status":"published","published":"2021-04-14T20:04:52Z","modified":"2024-05-20T16:03:47Z","updated_at":"2026-11-02T15:47:00.604718Z"}]}}