PT-2026-22347 · Fastify+2 · Fastify+2

Cristian Vargas · Published 2026-02-27 · Updated 2026-04-14 · CVE-2026-2293

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Nest.js version 11.1.13

Description A NestJS application utilizing the @nestjs/platform-fastify package may experience a bypass of authentication and authorization middleware when Fastify path-normalization options are enabled. This can potentially allow unauthorized access to protected resources.

Recommendations Ensure Fastify path-normalization options are disabled in NestJS applications using @nestjs/platform-fastify.

Exploit

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2026-2293

GHSA-7Q64-3RG2-H9PF

GHSA-R4WM-X892-VJMX

Affected Products

@Nestjs/Platform-Fastify

Fastify

Nestjs

References · 12

• 🔥 https://fluidattacks.com/advisories/neton · Exploit
• https://github.com/nestjs/nest/releases/tag/v11.1.14 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-2293 · Security Note
• https://osv.dev/vulnerability/GHSA-r4wm-x892-vjmx · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-2293 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-7q64-3rg2-h9pf · Vendor Advisory
• https://github.com/nestjs/nest · Note
• https://github.com/nestjs/nest/commit/fd8d073e0e048b185147209338ca7042e52c10ba · Note
• https://github.com/nestjs/nest/security/advisories/GHSA-r4wm-x892-vjmx · Note
• https://twitter.com/CVEnew/status/2027466601805852913 · Twitter Post
• https://t.me/CVEtracker/45987 · Telegram Post
• https://twitter.com/fluidattacks/status/2044168820235907180 · Twitter Post