{"cve":"CVE-2017-20146","nvd":{"published":"2022-12-27T22:15:11.070","modified":"2026-06-17T01:15:16.180","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-346"],"references":["https://github.com/gorilla/handlers/commit/90663712d74cb411cbef281bc1e08c19d1a76145","https://github.com/gorilla/handlers/pull/116","https://pkg.go.dev/vuln/GO-2020-0020","https://github.com/gorilla/handlers/commit/90663712d74cb411cbef281bc1e08c19d1a76145","https://github.com/gorilla/handlers/pull/116"],"products":["gorillatoolkit:handlers"],"source":"nvd","synced_at":"2026-10-19T21:37:31.370122805+00:00"},"epss":{"cve":"CVE-2017-20146","score":0.00765,"percentile":0.55465,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-jcr6-mmjj-pchw","url":"https://osv.dev/vulnerability/GHSA-jcr6-mmjj-pchw","summary":"gorilla/handlers may allow requester to bypass expected behavior of the Same Origin Policy","modified":"2023-11-08T03:59:17.264487Z","packages":[{"ecosystem":"Go","name":"github.com/gorilla/handlers","purl":"pkg:golang/github.com/gorilla/handlers","ranges":["<1.3.0"],"fixed":["1.3.0"]}]},{"id":"GO-2020-0020","url":"https://osv.dev/vulnerability/GO-2020-0020","summary":"Improper access control in github.com/gorilla/handlers","modified":"2024-05-20T16:03:47Z","packages":[{"ecosystem":"Go","name":"github.com/gorilla/handlers","purl":"pkg:golang/github.com/gorilla/handlers","ranges":["<1.3.0"],"fixed":["1.3.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}