PT-2026-25990 · Unknown+2 · @Nestjs/Platform-Fastify+2

Kamilmysliwiec · Published 2026-03-17 · Updated 2026-03-24 · CVE-2026-33011

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Nest versions 11.1.15 and below

Description Nest is a framework used for building scalable Node.js server-side applications. In versions 11.1.15 and earlier, applications utilizing the @nestjs/platform-fastify GET middleware can be bypassed. This occurs because Fastify automatically redirects HEAD requests to the corresponding GET handlers, if they exist. Consequently, the middleware is completely skipped, the HTTP response does not include a body, and the actual handler continues to execute. The issue stems from the automatic redirection of HEAD requests to GET handlers within the Fastify platform.

Recommendations Update to Nest version 11.1.16 or later.

Exploit

Fix

Weakness Enumeration

CWE-670

Related Identifiers

CVE-2026-33011

GHSA-WF42-42FG-FG84

Affected Products

@Nestjs/Platform-Fastify

Fastify

Nest

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33011.json · Exploit
• https://github.com/nestjs/nest/security/advisories/GHSA-wf42-42fg-fg84 · Vendor Advisory
• https://github.com/nestjs/nest/commit/cbdf737cd6e7cefa52d05ecea2ae4af95c464614 · Patch
• https://osv.dev/vulnerability/CVE-2026-33011 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-wf42-42fg-fg84 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33011 · Security Note
• https://github.com/nestjs/nest · Note
• https://github.com/nestjs/nest/releases/tag/v11.1.17 · Note
• https://twitter.com/dailycve/status/2036265193102098875 · Twitter Post
• https://twitter.com/CVEnew/status/2034891558311412107 · Twitter Post
• https://twitter.com/VolerionSec/status/2034863521071075543 · Twitter Post