{"id":"CVE-2024-27302","aliases":["EUVD-2024-0918","GHSA-fgxv-gw55-r5fq","GO-2024-2604"],"status":"published","title":"Authorization Bypass Through User-Controlled Key in go-zero","description":"go-zero is a web and rpc framework. Go-zero allows user to specify a CORS Filter with a configurable allows param - which is an array of domains allowed in CORS policy. However, the `isOriginAllowed` uses `strings.HasSuffix` to check the origin, which leads to bypass via a malicious domain. This vulnerability is capable of breaking CORS policy and thus allowing any page to make requests and/or retrieve data on behalf of other users. Version 1.4.4 fixes this issue.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00774,"percentile":0.56246,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-639"],"published":"2024-03-04T20:42:33Z","modified":"2026-10-28T02:31:12Z","fixes":[{"ecosystem":"Go","package":"github.com/zeromicro/go-zero","fixed_in":["1.4.4"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/zeromicro/go-zero","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.4"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/zeromicro/go-zero","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.4.4"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/zeromicro/go-zero","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.4.4"}]}]}],"products":[{"vendor":"go-zero","product":"go-zero"},{"vendor":"zeromicro","product":"go-zero"}],"references":[{"url":"https://github.com/zeromicro/go-zero/security/advisories/GHSA-fgxv-gw55-r5fq","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Vendor Advisory","advisory","web"]},{"url":"https://github.com/zeromicro/go-zero/commit/d9d79e930dff6218a873f4f02115df61c38b15db","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-27302","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-fgxv-gw55-r5fq"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/27xxx/CVE-2024-27302.json","tags":["advisory"]},{"url":"https://github.com/zeromicro/go-zero","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2024-27302","title":"Authorization Bypass Through User-Controlled Key in go-zero","description":"go-zero is a web and rpc framework. Go-zero allows user to specify a CORS Filter with a configurable allows param - which is an array of domains allowed in CORS policy. However, the `isOriginAllowed` uses `strings.HasSuffix` to check the origin, which leads to bypass via a malicious domain. This vulnerability is capable of breaking CORS policy and thus allowing any page to make requests and/or retrieve data on behalf of other users. Version 1.4.4 fixes this issue.\n","status":"published","published":"2024-03-06T18:31:31.309Z","modified":"2024-08-05T20:09:47.572Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"cna"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T14:34:12.982241Z"}],"euvd":[{"id":"EUVD-2024-0918","description":"go-zero is a web and rpc framework. Go-zero allows user to specify a CORS Filter with a configurable allows param - which is an array of domains allowed in CORS policy. However, the `isOriginAllowed` uses `strings.HasSuffix` to check the origin, which leads to bypass via a malicious domain. This vulnerability is capable of breaking CORS policy and thus allowing any page to make requests and/or retrieve data on behalf of other users. Version 1.4.4 fixes this issue.\n","status":"published","published":"2024-03-06T18:31:31Z","modified":"2024-08-05T20:09:47Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-03T02:23:12.944585Z"}],"ghsa":[{"id":"GHSA-fgxv-gw55-r5fq","title":"Authorization Bypass Through User-Controlled Key in go-zero","description":"### Summary\nHello go-zero maintainer team, I would like to report a security concerning your CORS Filter feature. \n\n### Details\nGo-zero allows user to specify a [CORS Filter](https://github.com/zeromicro/go-zero/blob/master/rest/internal/cors/handlers.go) with a configurable allows param - which is an array of domains allowed in CORS policy.\n\nHowever, the `isOriginAllowed` uses `strings.HasSuffix` to check the origin, which leads to bypass via domain like `evil-victim.com`\n```go\nfunc isOriginAllowed(allows []string, origin string) bool {\n\tfor _, o := range allows {\n\t\tif o == allOrigins {\n\t\t\treturn true\n\t\t}\n\n\t\tif strings.HasSuffix(origin, o) {\n\t\t\treturn true\n\t\t}\n\t}\n\n\treturn false\n}\n```\n\n### PoC\nUse code below as a PoC. Only requests from `safe.com` should bypass the CORS Filter\n```go\npackage main\n\nimport (\n\t\"errors\"\n\t\"net/http\"\n\n\t\"github.com/zeromicro/go-zero/rest\"\n)\n\nfunc main() {\n\tsvr := rest.MustNewServer(rest.RestConf{Port: 8888}, rest.WithRouter(mockedRouter{}), rest.WithCors(\"safe.com\"))\n\tsvr.Start()\n}\n\ntype mockedRouter struct{}\n\n// some sensitive path\nfunc (m mockedRouter) ServeHTTP(w http.ResponseWriter, r *http.Request) {\n\t// check user's cookie\n\t// ...\n\t// return sensitive data\n\tw.Write([]byte(\"social_id: 420101198008292930\"))\n}\n\nfunc (m mockedRouter) Handle(_, _ string, handler http.Handler) error {\n\treturn errors.New(\"foo\")\n}\n\nfunc (m mockedRouter) SetNotFoundHandler(_ http.Handler) {\n}\n\nfunc (m mockedRouter) SetNotAllowedHandler(_ http.Handler) {\n}\n```\nSend a request to localhost:8888 with `Origin:not-safe.com`\nYou can see the origin reflected in response, which bypass the CORS Filter\n![image](https://user-images.githubusercontent.com/70683161/221365842-9d76a3a4-a79d-413a-85b7-06b50b0a7807.png)\n\n### Impact\nThis vulnerability is capable of breaking CORS policy and thus allowing any page to make requests, retrieve data on behalf of other users.\n","status":"published","published":"2024-03-04T20:42:33Z","modified":"2026-03-24T05:02:20Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T14:39:40.633038Z"}],"nvd":[{"id":"CVE-2024-27302","description":"go-zero is a web and rpc framework. Go-zero allows user to specify a CORS Filter with a configurable allows param - which is an array of domains allowed in CORS policy. However, the `isOriginAllowed` uses `strings.HasSuffix` to check the origin, which leads to bypass via a malicious domain. This vulnerability is capable of breaking CORS policy and thus allowing any page to make requests and/or retrieve data on behalf of other users. Version 1.4.4 fixes this issue.\n","status":"published","published":"2024-03-06T19:15:08.33Z","modified":"2026-06-17T07:19:36.433Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"secondary"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T14:09:39.488031Z"}],"osv":[{"id":"CVE-2024-27302","title":"Authorization Bypass Through User-Controlled Key in go-zero","description":"go-zero is a web and rpc framework. Go-zero allows user to specify a CORS Filter with a configurable allows param - which is an array of domains allowed in CORS policy. However, the `isOriginAllowed` uses `strings.HasSuffix` to check the origin, which leads to bypass via a malicious domain. This vulnerability is capable of breaking CORS policy and thus allowing any page to make requests and/or retrieve data on behalf of other users. Version 1.4.4 fixes this issue.\n","status":"published","published":"2024-03-06T18:31:31.309Z","modified":"2026-10-28T02:31:12.686207193Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T15:44:39.569658Z"},{"id":"GHSA-fgxv-gw55-r5fq","title":"Authorization Bypass Through User-Controlled Key in go-zero","description":"### Summary\nHello go-zero maintainer team, I would like to report a security concerning your CORS Filter feature. \n\n### Details\nGo-zero allows user to specify a [CORS Filter](https://github.com/zeromicro/go-zero/blob/master/rest/internal/cors/handlers.go) with a configurable allows param - which is an array of domains allowed in CORS policy.\n\nHowever, the `isOriginAllowed` uses `strings.HasSuffix` to check the origin, which leads to bypass via domain like `evil-victim.com`\n```go\nfunc isOriginAllowed(allows []string, origin string) bool {\n\tfor _, o := range allows {\n\t\tif o == allOrigins {\n\t\t\treturn true\n\t\t}\n\n\t\tif strings.HasSuffix(origin, o) {\n\t\t\treturn true\n\t\t}\n\t}\n\n\treturn false\n}\n```\n\n### PoC\nUse code below as a PoC. Only requests from `safe.com` should bypass the CORS Filter\n```go\npackage main\n\nimport (\n\t\"errors\"\n\t\"net/http\"\n\n\t\"github.com/zeromicro/go-zero/rest\"\n)\n\nfunc main() {\n\tsvr := rest.MustNewServer(rest.RestConf{Port: 8888}, rest.WithRouter(mockedRouter{}), rest.WithCors(\"safe.com\"))\n\tsvr.Start()\n}\n\ntype mockedRouter struct{}\n\n// some sensitive path\nfunc (m mockedRouter) ServeHTTP(w http.ResponseWriter, r *http.Request) {\n\t// check user's cookie\n\t// ...\n\t// return sensitive data\n\tw.Write([]byte(\"social_id: 420101198008292930\"))\n}\n\nfunc (m mockedRouter) Handle(_, _ string, handler http.Handler) error {\n\treturn errors.New(\"foo\")\n}\n\nfunc (m mockedRouter) SetNotFoundHandler(_ http.Handler) {\n}\n\nfunc (m mockedRouter) SetNotAllowedHandler(_ http.Handler) {\n}\n```\nSend a request to localhost:8888 with `Origin:not-safe.com`\nYou can see the origin reflected in response, which bypass the CORS Filter\n![image](https://user-images.githubusercontent.com/70683161/221365842-9d76a3a4-a79d-413a-85b7-06b50b0a7807.png)\n\n### Impact\nThis vulnerability is capable of breaking CORS policy and thus allowing any page to make requests, retrieve data on behalf of other users.\n","status":"published","published":"2024-03-04T20:42:33Z","modified":"2026-09-10T03:50:10.507380539Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T15:46:46.39441Z"},{"id":"GO-2024-2604","title":"CORS Filter bypass in github.com/zeromicro/go-zero","description":"The CORS Filter feature in go-zero allows users to specify an array of domains allowed in the CORS policy. However, the isOriginAllowed function uses strings.HasSuffix to check the origin, which can lead to a bypass via a domain like \"evil-victim.com\". This vulnerability is capable of breaking CORS policy and thus allowing any page to make requests and retrieve data on behalf of other users.","status":"published","published":"2024-03-11T18:58:48Z","modified":"2024-05-20T16:03:47Z","updated_at":"2026-11-02T15:47:01.185262Z"}]}}