Auth bypass in Nest.js
CVE-2026-2293
A NestJS application using @nestjs/platform-fastify can allow bypass of authentication/authorization middleware when Fastify path-normalization options are enabled. This issue affects nest.Js: 11.1.13.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (50.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000
Affected products
- Nest.js — versions 11.1.13
- Nestjs Nest — versions 11.1.13
Weakness classification (CWE)
References
- fluidattacks.com/advisories/neton (Exploit, Third Party Advisory, third-party-advisory)
- github.com/nestjs/nest/ (Product, product)
- github.com/nestjs/nest/releases/tag/v11.1.14 (Release Notes, patch)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-2293?
- CVE-2026-2293 is a critical-severity vulnerability in Nest.js, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2026-02-27.
- How severe is CVE-2026-2293?
- Critical severity. CVSS v3 base score is 9.8 out of 10.