CVE
CVE-2026-33011
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/platform-fastify@11.1.16
Package Versions Affected
Package Version
patch Availability
No items found.
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Fix Without Upgrading
Detect compatible fix
Apply safe remediation
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CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.7
-
4.0
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
C
H
U
0
-
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Related Resources
No items found.
References
https://github.com/nestjs/nest/security/advisories/GHSA-wf42-42fg-fg84, https://nvd.nist.gov/vuln/detail/CVE-2026-33011, https://github.com/nestjs/nest/commit/cbdf737cd6e7cefa52d05ecea2ae4af95c464614, https://github.com/nestjs/nest, https://github.com/nestjs/nest/releases/tag/v11.1.17
Basic Information
Ecosystem
