{"id":"CVE-2026-33011","aliases":["GHSA-wf42-42fg-fg84"],"url":"https://o3.security/vulnerability/CVE-2026-33011","summary":"Nest Fastify HEAD Request Middleware Bypass","details":"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.","published":"2026-03-20T04:37:15.044Z","modified":"2026-08-12T03:51:34.285609492Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@nestjs/platform-fastify","fixedVersion":"11.1.16"}],"fix":{"url":"https://github.com/nestjs/nest/commit/cbdf737cd6e7cefa52d05ecea2ae4af95c464614","label":"nestjs/nest@cbdf737"},"references":[{"type":"WEB","url":"https://github.com/nestjs/nest/releases/tag/v11.1.17"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33011.json"},{"type":"ADVISORY","url":"https://github.com/nestjs/nest/security/advisories/GHSA-wf42-42fg-fg84"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33011"},{"type":"FIX","url":"https://github.com/nestjs/nest/commit/cbdf737cd6e7cefa52d05ecea2ae4af95c464614"},{"type":"PACKAGE","url":"https://github.com/nestjs/nest"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:34.285609492Z"}}