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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-6414 Detail

Description

@fastify/static versions 8.0.0 through 9.1.0 decode percent-encoded path separators (%2F) before filesystem resolution, while Fastify's router treats them as literal characters. This mismatch allows attackers to bypass route-based middleware or guards that protect files served by @fastify/static. For example, a route guard on a protected path can be circumvented by encoding the path separator in the URL. Upgrade to @fastify/static 9.1.1 to fix this issue. There are no workarounds.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://cna.openjsf.org/security-advisories.html openjs
https://github.com/fastify/fastify-static/security/advisories/GHSA-x428-ghpx-8j92 openjs
https://github.com/fastify/middie/security/advisories/GHSA-cxrg-g7r8-w69p openjs
https://github.com/honojs/hono/security/advisories/GHSA-q5qw-h33p-qvwr openjs

Weakness Enumeration

CWE-ID CWE Name Source
CWE-177 Improper Handling of URL Encoding (Hex Encoding) openjs  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-6414
NVD Published Date:
04/16/2026
NVD Last Modified:
04/17/2026
Source:
openjs