CVE-2026-33011
published 2026-03-20CVE-2026-33011: 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…
PriorityP345high7.5CVSS 3.1
AVNACLPRNUINSUCNIHAN
EPSS
0.35%
26.4th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| nestjs | nest | < 11.1.16 | 11.1.16 |
| nestjs | platform-fastify | >= 0 < 11.1.16 | 11.1.16 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
nvdv4.08.7HIGHCVSS: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
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OSV
Nest Fastify HEAD Request Middleware Bypass
osv·2026-03-17
CVE-2026-33011 [HIGH] Nest Fastify HEAD Request Middleware Bypass
Nest Fastify HEAD Request Middleware Bypass
### Impact
In 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).
- The actual handler will still be executed.
### Patches
Fixed in `@nestjs/[email protected]`
GHSA
Nest Fastify HEAD Request Middleware Bypass
ghsa·2026-03-17
CVE-2026-33011 [HIGH] CWE-670 Nest Fastify HEAD Request Middleware Bypass
Nest Fastify HEAD Request Middleware Bypass
### Impact
In 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).
- The actual handler will still be executed.
### Patches
Fixed in `@nestjs/[email protected]`
No detection rules found.
No public exploits indexed.
2026-03-20
Published