{"id":"CVE-2026-33011","aliases":["EUVD-2026-13549","GHSA-wf42-42fg-fg84"],"status":"published","title":"Nest Fastify HEAD Request Middleware Bypass","description":"Nest is a framework for building scalable Node.js server-side applications. In versions 11.1.15 and below, a NestJS application using @nestjs/platform-fastify GET middleware can be bypassed because Fastify automatically redirects HEAD requests to the corresponding GET handlers (if they exist). As a result: middleware will be completely skipped, the HTTP response won't include a body (since the response is truncated when redirecting a HEAD request to a GET handler), and the actual handler will still be executed. This issue is fixed in version 11.1.16.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0036,"percentile":0.30127,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-670"],"published":"2026-03-17T18:38:38Z","modified":"2026-10-28T02:30:38Z","fixes":[{"ecosystem":"npm","package":"@nestjs/platform-fastify","fixed_in":["11.1.16"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@nestjs/platform-fastify","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"11.1.15"},{"fixed":"11.1.16"}]}]},{"source":"osv","ecosystem":"npm","package":"@nestjs/platform-fastify","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"11.1.16"}]}]}],"products":[{"vendor":"nestjs","product":"nest"}],"references":[{"url":"https://github.com/nestjs/nest/security/advisories/GHSA-wf42-42fg-fg84","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory","web"]},{"url":"https://github.com/nestjs/nest/commit/cbdf737cd6e7cefa52d05ecea2ae4af95c464614","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/nestjs/nest/releases/tag/v11.1.17","tags":["x_refsource_MISC","Product","Release Notes","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33011","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-wf42-42fg-fg84"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33011.json","tags":["advisory"]},{"url":"https://github.com/nestjs/nest","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-33011","title":"Nest Fastify HEAD Request Middleware Bypass","description":"Nest is a framework for building scalable Node.js server-side applications. In versions 11.1.15 and below, a NestJS application using @nestjs/platform-fastify GET middleware can be bypassed because Fastify automatically redirects HEAD requests to the corresponding GET handlers (if they exist). As a result: middleware will be completely skipped, the HTTP response won't include a body (since the response is truncated when redirecting a HEAD request to a GET handler), and the actual handler will still be executed. This issue is fixed in version 11.1.16.","status":"published","published":"2026-03-20T04:37:15.044Z","modified":"2026-03-20T15:48:23.564Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-670"],"updated_at":"2026-11-02T14:20:08.009733Z"}],"euvd":[{"id":"EUVD-2026-13549","description":"Nest is a framework for building scalable Node.js server-side applications. In versions 11.1.15 and below, a NestJS application using @nestjs/platform-fastify GET middleware can be bypassed because Fastify automatically redirects HEAD requests to the corresponding GET handlers (if they exist). As a result: middleware will be completely skipped, the HTTP response won't include a body (since the response is truncated when redirecting a HEAD request to a GET handler), and the actual handler will still be executed. This issue is fixed in version 11.1.16.","status":"published","published":"2026-03-20T04:37:15Z","modified":"2026-03-20T15:48:23Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T19:25:32.430758Z"}],"ghsa":[{"id":"GHSA-wf42-42fg-fg84","title":"Nest Fastify HEAD Request Middleware Bypass","description":"### Impact\n\nIn a NestJS application using `@nestjs/platform-fastify`, GET middleware can be bypassed because Fastify automatically redirects HEAD requests to the corresponding GET handlers (if they exist).\n\nAs a result:\n\n- Middleware will be completely skipped.\n- The HTTP response won't include a body (since the response is truncated when redirecting a HEAD request to a GET handler).\n- The actual handler will still be executed.\n\n### Patches\n\nFixed in `@nestjs/platform-fastify@11.1.16`","status":"published","published":"2026-03-17T18:38:38Z","modified":"2026-03-20T21:21:46Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-670"],"updated_at":"2026-11-02T14:39:39.567266Z"}],"nvd":[{"id":"CVE-2026-33011","description":"Nest is a framework for building scalable Node.js server-side applications. In versions 11.1.15 and below, a NestJS application using @nestjs/platform-fastify GET middleware can be bypassed because Fastify automatically redirects HEAD requests to the corresponding GET handlers (if they exist). As a result: middleware will be completely skipped, the HTTP response won't include a body (since the response is truncated when redirecting a HEAD request to a GET handler), and the actual handler will still be executed. This issue is fixed in version 11.1.16.","status":"published","published":"2026-03-20T05:16:15.043Z","modified":"2026-06-17T10:36:46.587Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-670"],"updated_at":"2026-11-02T14:12:10.126802Z"}],"osv":[{"id":"CVE-2026-33011","title":"Nest Fastify HEAD Request Middleware Bypass","description":"Nest is a framework for building scalable Node.js server-side applications. In versions 11.1.15 and below, a NestJS application using @nestjs/platform-fastify GET middleware can be bypassed because Fastify automatically redirects HEAD requests to the corresponding GET handlers (if they exist). As a result: middleware will be completely skipped, the HTTP response won't include a body (since the response is truncated when redirecting a HEAD request to a GET handler), and the actual handler will still be executed. This issue is fixed in version 11.1.16.","status":"published","published":"2026-03-20T04:37:15.044Z","modified":"2026-10-28T02:30:38.737898121Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-670"],"updated_at":"2026-11-02T15:45:01.548715Z"},{"id":"GHSA-wf42-42fg-fg84","title":"Nest Fastify HEAD Request Middleware Bypass","description":"### Impact\n\nIn a NestJS application using `@nestjs/platform-fastify`, GET middleware can be bypassed because Fastify automatically redirects HEAD requests to the corresponding GET handlers (if they exist).\n\nAs a result:\n\n- Middleware will be completely skipped.\n- The HTTP response won't include a body (since the response is truncated when redirecting a HEAD request to a GET handler).\n- The actual handler will still be executed.\n\n### Patches\n\nFixed in `@nestjs/platform-fastify@11.1.16`","status":"published","published":"2026-03-17T18:38:38Z","modified":"2026-03-20T21:37:35.41754Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-670"],"updated_at":"2026-11-02T15:46:58.401149Z"}]}}