{"id":"CVE-2025-46721","aliases":["EUVD-2025-14655","GHSA-w9hf-35q4-vcjw","GO-2025-3683","openSUSE-SU-2025:15135-1"],"status":"published","title":"nosurf vulnerable to CSRF due to non-functional same-origin request checks","description":"nosurf is cross-site request forgery (CSRF) protection middleware for Go. A vulnerability in versions prior to 1.2.0 allows an attacker who controls content on the target site, or on a subdomain of the target site (either via XSS, or otherwise) to bypass CSRF checks and issue requests on user's behalf. Due to misuse of the Go `net/http` library, nosurf categorizes all incoming requests as plain-text HTTP requests, in which case the `Referer` header is not checked to have the same origin as the target webpage. If the attacker has control over HTML contents on either the target website (e.g. `example.com`), or on a website hosted on a subdomain of the target (e.g. `attacker.example.com`), they will also be able to manipulate cookies set for the target website. By acquiring the secret CSRF token from the cookie, or overriding the cookie with a new token known to the attacker, `attacker.example.com` is able to craft cross-site requests to `example.com`. A patch for the issue was released in nosurf 1.2.0. In lieu of upgrading to a patched version of nosurf, users may additionally use another HTTP middleware to ensure that a non-safe HTTP request is coming from the same origin (e.g. by requiring a `Sec-Fetch-Site: same-origin` header in the request).","severity":{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00244,"percentile":0.15709,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-352"],"published":"2025-05-13T15:29:30Z","modified":"2026-10-28T02:30:51Z","exploits":[{"source":"pocgithub","id":"justinas/nosurf-cve-2025-46721","title":"justinas/nosurf-cve-2025-46721","date":"2025-04-30","url":"https://github.com/justinas/nosurf-cve-2025-46721"}],"fixes":[{"ecosystem":"Go","package":"github.com/justinas/nosurf","fixed_in":["1.2.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/justinas/nosurf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/justinas/nosurf","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.2.0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/justinas/nosurf","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.2.0"}]}]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"govulncheck-vulndb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.20250515T200012-1.1"}]}],"bundled":11}],"products":[{"vendor":"justinas","product":"nosurf"},{"vendor":"nosurf_project","product":"nosurf"}],"references":[{"url":"https://github.com/justinas/nosurf/security/advisories/GHSA-w9hf-35q4-vcjw","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory","web"]},{"url":"https://github.com/justinas/nosurf/commit/ec9bb776d8e5ba9e906b6eb70428f4e7b009feee","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/advisories/GHSA-rq77-p4h8-4crw","tags":["x_refsource_MISC","exploit","Not Applicable","advisory","web"]},{"url":"https://github.com/justinas/nosurf-cve-2025-46721","tags":["x_refsource_MISC","Exploit","Third Party Advisory","package","web"]},{"url":"https://github.com/justinas/nosurf/releases/tag/v1.2.0","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-46721","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-w9hf-35q4-vcjw"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/46xxx/CVE-2025-46721.json","tags":["advisory"]},{"url":"https://github.com/justinas/nosurf","tags":["package"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/QOPKRPL75SZMLT3YSQAZEDWH7RBRXGJK/","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2024-52290","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-8063","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-3757","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-3931","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-4432","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-46331","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-4658","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-46721","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-46735","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-46815","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-46816","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2025-46721","title":"nosurf vulnerable to CSRF due to non-functional same-origin request checks","description":"nosurf is cross-site request forgery (CSRF) protection middleware for Go. A vulnerability in versions prior to 1.2.0 allows an attacker who controls content on the target site, or on a subdomain of the target site (either via XSS, or otherwise) to bypass CSRF checks and issue requests on user's behalf. Due to misuse of the Go `net/http` library, nosurf categorizes all incoming requests as plain-text HTTP requests, in which case the `Referer` header is not checked to have the same origin as the target webpage. If the attacker has control over HTML contents on either the target website (e.g. `example.com`), or on a website hosted on a subdomain of the target (e.g. `attacker.example.com`), they will also be able to manipulate cookies set for the target website. By acquiring the secret CSRF token from the cookie, or overriding the cookie with a new token known to the attacker, `attacker.example.com` is able to craft cross-site requests to `example.com`. A patch for the issue was released in nosurf 1.2.0. In lieu of upgrading to a patched version of nosurf, users may additionally use another HTTP middleware to ensure that a non-safe HTTP request is coming from the same origin (e.g. by requiring a `Sec-Fetch-Site: same-origin` header in the request).","status":"published","published":"2025-05-13T15:29:30.068Z","modified":"2025-05-13T19:07:23.093Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:32:36.385228Z"}],"euvd":[{"id":"EUVD-2025-14655","description":"nosurf is cross-site request forgery (CSRF) protection middleware for Go. A vulnerability in versions prior to 1.2.0 allows an attacker who controls content on the target site, or on a subdomain of the target site (either via XSS, or otherwise) to bypass CSRF checks and issue requests on user's behalf. Due to misuse of the Go `net/http` library, nosurf categorizes all incoming requests as plain-text HTTP requests, in which case the `Referer` header is not checked to have the same origin as the target webpage. If the attacker has control over HTML contents on either the target website (e.g. `example.com`), or on a website hosted on a subdomain of the target (e.g. `attacker.example.com`), they will also be able to manipulate cookies set for the target website. By acquiring the secret CSRF token from the cookie, or overriding the cookie with a new token known to the attacker, `attacker.example.com` is able to craft cross-site requests to `example.com`. A patch for the issue was released in nosurf 1.2.0. In lieu of upgrading to a patched version of nosurf, users may additionally use another HTTP middleware to ensure that a non-safe HTTP request is coming from the same origin (e.g. by requiring a `Sec-Fetch-Site: same-origin` header in the request).","status":"published","published":"2025-05-13T15:29:30Z","modified":"2025-05-13T19:07:23Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T20:32:48.430739Z"}],"ghsa":[{"id":"GHSA-w9hf-35q4-vcjw","title":"nosurf vulnerable to CSRF due to non-functional same-origin request checks","description":"### Impact\n\nThis vulnerability allows an attacker who controls content on the target site, or on a subdomain of the target site (either via XSS, or otherwise) to bypass Cross-Site Request Forgery checks and issue requests on user's behalf.\n\n### Details\n\nDue to misuse of the Go `net/http` library, nosurf categorizes all incoming requests as plain-text HTTP requests, in which case the `Referer` header is not checked to have the same origin as the target webpage.\n\nIf the attacker has control over HTML contents on either the target website (e.g. `example.com`), or on a website hosted on a subdomain of the target (e.g. `attacker.example.com`), they will also be able to manipulate cookies set for the target website. By acquiring the secret CSRF token from the cookie, or overriding the cookie with a new token known to the attacker, `attacker.example.com` is able to craft cross-site requests to `example.com`. \n\n### Patches\n\nA patch for the issue was released in nosurf 1.2.0.\n\n### Workarounds\n\nIn lieu of upgrading to a patched version of nosurf, users may additionally use another HTTP middleware to ensure that a non-safe HTTP request is coming from the same origin (e.g. by requiring a `Sec-Fetch-Site: same-origin` header in the request).\n\n### References\n\nhttps://github.com/advisories/GHSA-rq77-p4h8-4crw\nhttps://github.com/justinas/nosurf-cve-2025-46721\nhttps://www.cve.org/CVERecord?id=CVE-2025-46721\nhttps://github.com/justinas/nosurf/releases/tag/v1.2.0","status":"published","published":"2025-05-14T14:56:27Z","modified":"2025-05-14T14:56:28Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:38:43.172412Z"}],"nvd":[{"id":"CVE-2025-46721","description":"nosurf is cross-site request forgery (CSRF) protection middleware for Go. A vulnerability in versions prior to 1.2.0 allows an attacker who controls content on the target site, or on a subdomain of the target site (either via XSS, or otherwise) to bypass CSRF checks and issue requests on user's behalf. Due to misuse of the Go `net/http` library, nosurf categorizes all incoming requests as plain-text HTTP requests, in which case the `Referer` header is not checked to have the same origin as the target webpage. If the attacker has control over HTML contents on either the target website (e.g. `example.com`), or on a website hosted on a subdomain of the target (e.g. `attacker.example.com`), they will also be able to manipulate cookies set for the target website. By acquiring the secret CSRF token from the cookie, or overriding the cookie with a new token known to the attacker, `attacker.example.com` is able to craft cross-site requests to `example.com`. A patch for the issue was released in nosurf 1.2.0. In lieu of upgrading to a patched version of nosurf, users may additionally use another HTTP middleware to ensure that a non-safe HTTP request is coming from the same origin (e.g. by requiring a `Sec-Fetch-Site: same-origin` header in the request).","status":"published","published":"2025-05-13T16:15:31.75Z","modified":"2026-06-17T09:26:52.463Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:11:07.176032Z"}],"osv":[{"id":"CVE-2025-46721","title":"nosurf vulnerable to CSRF due to non-functional same-origin request checks","description":"nosurf is cross-site request forgery (CSRF) protection middleware for Go. A vulnerability in versions prior to 1.2.0 allows an attacker who controls content on the target site, or on a subdomain of the target site (either via XSS, or otherwise) to bypass CSRF checks and issue requests on user's behalf. Due to misuse of the Go `net/http` library, nosurf categorizes all incoming requests as plain-text HTTP requests, in which case the `Referer` header is not checked to have the same origin as the target webpage. If the attacker has control over HTML contents on either the target website (e.g. `example.com`), or on a website hosted on a subdomain of the target (e.g. `attacker.example.com`), they will also be able to manipulate cookies set for the target website. By acquiring the secret CSRF token from the cookie, or overriding the cookie with a new token known to the attacker, `attacker.example.com` is able to craft cross-site requests to `example.com`. A patch for the issue was released in nosurf 1.2.0. In lieu of upgrading to a patched version of nosurf, users may additionally use another HTTP middleware to ensure that a non-safe HTTP request is coming from the same origin (e.g. by requiring a `Sec-Fetch-Site: same-origin` header in the request).","status":"published","published":"2025-05-13T15:29:30.068Z","modified":"2026-11-11T10:47:21.389915206Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-352"],"updated_at":"2026-11-11T03:22:10.85011Z"},{"id":"GHSA-w9hf-35q4-vcjw","title":"nosurf vulnerable to CSRF due to non-functional same-origin request checks","description":"### Impact\n\nThis vulnerability allows an attacker who controls content on the target site, or on a subdomain of the target site (either via XSS, or otherwise) to bypass Cross-Site Request Forgery checks and issue requests on user's behalf.\n\n### Details\n\nDue to misuse of the Go `net/http` library, nosurf categorizes all incoming requests as plain-text HTTP requests, in which case the `Referer` header is not checked to have the same origin as the target webpage.\n\nIf the attacker has control over HTML contents on either the target website (e.g. `example.com`), or on a website hosted on a subdomain of the target (e.g. `attacker.example.com`), they will also be able to manipulate cookies set for the target website. By acquiring the secret CSRF token from the cookie, or overriding the cookie with a new token known to the attacker, `attacker.example.com` is able to craft cross-site requests to `example.com`. \n\n### Patches\n\nA patch for the issue was released in nosurf 1.2.0.\n\n### Workarounds\n\nIn lieu of upgrading to a patched version of nosurf, users may additionally use another HTTP middleware to ensure that a non-safe HTTP request is coming from the same origin (e.g. by requiring a `Sec-Fetch-Site: same-origin` header in the request).\n\n### References\n\nhttps://github.com/advisories/GHSA-rq77-p4h8-4crw\nhttps://github.com/justinas/nosurf-cve-2025-46721\nhttps://www.cve.org/CVERecord?id=CVE-2025-46721\nhttps://github.com/justinas/nosurf/releases/tag/v1.2.0","status":"published","published":"2025-05-14T14:56:27Z","modified":"2026-02-04T03:18:59.06698Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T15:46:58.401149Z"},{"id":"GO-2025-3683","title":"Vulnerable to CSRF due to non-functional same-origin request checks in github.com/justinas/nosurf","description":"Vulnerable to CSRF due to non-functional same-origin request checks in github.com/justinas/nosurf","status":"published","published":"2025-05-15T19:23:25Z","modified":"2025-06-12T14:09:57Z","updated_at":"2026-11-02T15:47:01.728182Z"},{"id":"openSUSE-SU-2025:15135-1","title":"govulncheck-vulndb-0.0.20250515T200012-1.1 on GA media","description":"These are all security issues fixed in the govulncheck-vulndb-0.0.20250515T200012-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2025-05-20T00:00:00Z","modified":"2026-02-05T09:20:55.285479Z","updated_at":"2026-11-02T16:58:37.399567Z"}]}}