{"id":"CVE-2017-20146","aliases":["GHSA-jcr6-mmjj-pchw","GO-2020-0020"],"url":"https://o3.security/vulnerability/CVE-2017-20146","summary":"gorilla/handlers may allow requester to bypass expected behavior of the Same Origin Policy","details":"Usage of the CORS handler may apply improper CORS headers, allowing the requester to explicitly control the value of the Access-Control-Allow-Origin header, which bypasses the expected behavior of the Same Origin Policy.","published":"2022-12-27T22:15:11.070Z","modified":"2026-07-08T15:11:07.025677Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/gorilla/handlers","fixedVersion":"1.3.0"}],"fix":{"url":"https://github.com/gorilla/handlers/commit/90663712d74cb411cbef281bc1e08c19d1a76145","label":"gorilla/handlers@9066371"},"references":[{"type":"ADVISORY","url":"https://pkg.go.dev/vuln/GO-2020-0020"},{"type":"FIX","url":"https://github.com/gorilla/handlers/commit/90663712d74cb411cbef281bc1e08c19d1a76145"},{"type":"FIX","url":"https://github.com/gorilla/handlers/pull/116"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-20146"},{"type":"PACKAGE","url":"https://github.com/gorilla/handlers"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T15:11:07.025677Z"}}