{"id":"CVE-2022-41919","aliases":["EUVD-2022-7208","GHSA-3fjj-p79j-c9hh"],"status":"published","title":"Fastify vulnerable to Cross-Site Request Forgery (CSRF) attack via incorrect content type","description":"Fastify is a web framework with minimal overhead and plugin architecture. The attacker can use the incorrect `Content-Type` to bypass the `Pre-Flight` checking of `fetch`. `fetch()` requests with Content-Type’s essence as \"application/x-www-form-urlencoded\", \"multipart/form-data\", or \"text/plain\", could potentially be used to invoke routes that only accepts `application/json` content type, thus bypassing any CORS protection, and therefore they could lead to a Cross-Site Request Forgery attack. This issue has been patched in version 4.10.2 and 3.29.4. As a workaround, implement Cross-Site Request Forgery protection using `@fastify/csrf'.","severity":{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00409,"percentile":0.3548,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-352"],"published":"2022-11-21T22:28:11Z","modified":"2026-10-28T02:30:31Z","fixes":[{"ecosystem":"npm","package":"fastify","fixed_in":["4.10.2","3.29.4"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"fastify","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.10.2"}]}]},{"source":"ghsa","ecosystem":"npm","package":"fastify","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.29.4"}]}]},{"source":"osv","ecosystem":"npm","package":"fastify","ranges":[{"type":"SEMVER","events":[{"introduced":"4.0.0"},{"fixed":"4.10.2"}]}]},{"source":"osv","ecosystem":"npm","package":"fastify","ranges":[{"type":"SEMVER","events":[{"introduced":"3.0.0"},{"fixed":"3.29.4"}]}]}],"products":[{"vendor":"@clerk","product":"fastify"},{"vendor":"fastify","product":"fastify"}],"references":[{"url":"https://github.com/fastify/fastify/security/advisories/GHSA-3fjj-p79j-c9hh","tags":["x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://github.com/fastify/fastify/commit/62dde76f1f7aca76e38625fe8d983761f26e6fc9","tags":["x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://www.npmjs.com/package/%40fastify/csrf","tags":["x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-41919","tags":["advisory"]},{"url":"https://www.npmjs.com/package/@fastify/csrf","tags":["web"]},{"url":"https://github.com/advisories/GHSA-3fjj-p79j-c9hh"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/41xxx/CVE-2022-41919.json","tags":["advisory"]},{"url":"https://github.com/fastify/fastify","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2022-41919","title":"Fastify vulnerable to Cross-Site Request Forgery (CSRF) attack via incorrect content type","description":"Fastify is a web framework with minimal overhead and plugin architecture. The attacker can use the incorrect `Content-Type` to bypass the `Pre-Flight` checking of `fetch`. `fetch()` requests with Content-Type’s essence as \"application/x-www-form-urlencoded\", \"multipart/form-data\", or \"text/plain\", could potentially be used to invoke routes that only accepts `application/json` content type, thus bypassing any CORS protection, and therefore they could lead to a Cross-Site Request Forgery attack. This issue has been patched in version 4.10.2 and 3.29.4. As a workaround, implement Cross-Site Request Forgery protection using `@fastify/csrf'.","status":"published","published":"2022-11-22T00:00:00Z","modified":"2025-04-23T16:36:24.268Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:34:28.038197Z"}],"euvd":[{"id":"EUVD-2022-7208","description":"Fastify is a web framework with minimal overhead and plugin architecture. The attacker can use the incorrect `Content-Type` to bypass the `Pre-Flight` checking of `fetch`. `fetch()` requests with Content-Type’s essence as \"application/x-www-form-urlencoded\", \"multipart/form-data\", or \"text/plain\", could potentially be used to invoke routes that only accepts `application/json` content type, thus bypassing any CORS protection, and therefore they could lead to a Cross-Site Request Forgery attack. This issue has been patched in version 4.10.2 and 3.29.4. As a workaround, implement Cross-Site Request Forgery protection using `@fastify/csrf'.","status":"published","published":"2022-11-22T00:00:00Z","modified":"2025-04-23T16:36:24Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T20:52:12.313971Z"}],"ghsa":[{"id":"GHSA-3fjj-p79j-c9hh","title":"Fastify: Incorrect Content-Type parsing can lead to CSRF attack ","description":"### Impact\n\nThe attacker can use the incorrect `Content-Type` to bypass the `Pre-Flight` checking of `fetch`. `fetch()` requests with Content-Type’s [essence](https://mimesniff.spec.whatwg.org/#mime-type-essence) as \"application/x-www-form-urlencoded\", \"multipart/form-data\", or \"text/plain\", could potentially be used to invoke routes that only accepts `application/json` content type, thus bypassing any [CORS protection](https://fetch.spec.whatwg.org/#simple-header), and therefore they could lead to a  Cross-Site Request Forgery attack.\n\n### Patches\nFor `4.x` users, please update to at least `4.10.2`\nFor `3.x` users, please update to at least `3.29.4`\n\n### Workarounds\n\nImplement Cross-Site Request Forgery protection using [`@fastify/csrf`](https://www.npmjs.com/package/@fastify/csrf).\n\n### References\n\nCheck out the HackerOne report: https://hackerone.com/reports/1763832.\n\n### For more information\n\n[Fastify security policy](https://github.com/fastify/fastify/security/policy)\n","status":"published","published":"2022-11-21T22:28:11Z","modified":"2023-01-31T05:07:11Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:36:29.957996Z"}],"nvd":[{"id":"CVE-2022-41919","description":"Fastify is a web framework with minimal overhead and plugin architecture. The attacker can use the incorrect `Content-Type` to bypass the `Pre-Flight` checking of `fetch`. `fetch()` requests with Content-Type’s essence as \"application/x-www-form-urlencoded\", \"multipart/form-data\", or \"text/plain\", could potentially be used to invoke routes that only accepts `application/json` content type, thus bypassing any CORS protection, and therefore they could lead to a Cross-Site Request Forgery attack. This issue has been patched in version 4.10.2 and 3.29.4. As a workaround, implement Cross-Site Request Forgery protection using `@fastify/csrf'.","status":"published","published":"2022-11-22T20:15:11.11Z","modified":"2026-06-17T05:04:03.767Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:07:32.395456Z"}],"osv":[{"id":"CVE-2022-41919","title":"Fastify vulnerable to Cross-Site Request Forgery (CSRF) attack via incorrect content type","description":"Fastify is a web framework with minimal overhead and plugin architecture. The attacker can use the incorrect `Content-Type` to bypass the `Pre-Flight` checking of `fetch`. `fetch()` requests with Content-Type’s essence as \"application/x-www-form-urlencoded\", \"multipart/form-data\", or \"text/plain\", could potentially be used to invoke routes that only accepts `application/json` content type, thus bypassing any CORS protection, and therefore they could lead to a Cross-Site Request Forgery attack. This issue has been patched in version 4.10.2 and 3.29.4. As a workaround, implement Cross-Site Request Forgery protection using `@fastify/csrf'.","status":"published","published":"2022-11-22T00:00:00Z","modified":"2026-10-28T02:30:31.260930405Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T15:44:27.186787Z"},{"id":"GHSA-3fjj-p79j-c9hh","title":"Fastify: Incorrect Content-Type parsing can lead to CSRF attack ","description":"### Impact\n\nThe attacker can use the incorrect `Content-Type` to bypass the `Pre-Flight` checking of `fetch`. `fetch()` requests with Content-Type’s [essence](https://mimesniff.spec.whatwg.org/#mime-type-essence) as \"application/x-www-form-urlencoded\", \"multipart/form-data\", or \"text/plain\", could potentially be used to invoke routes that only accepts `application/json` content type, thus bypassing any [CORS protection](https://fetch.spec.whatwg.org/#simple-header), and therefore they could lead to a  Cross-Site Request Forgery attack.\n\n### Patches\nFor `4.x` users, please update to at least `4.10.2`\nFor `3.x` users, please update to at least `3.29.4`\n\n### Workarounds\n\nImplement Cross-Site Request Forgery protection using [`@fastify/csrf`](https://www.npmjs.com/package/@fastify/csrf).\n\n### References\n\nCheck out the HackerOne report: https://hackerone.com/reports/1763832.\n\n### For more information\n\n[Fastify security policy](https://github.com/fastify/fastify/security/policy)\n","status":"published","published":"2022-11-21T22:28:11Z","modified":"2023-11-08T04:10:35.631515Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T15:46:35.747385Z"}]}}