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CVE-2026-6414

MEDIUM

5.9

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.

Details CVE

Score CVSS v3.15.9

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Vecteur d'attaqueNETWORK

ComplexiteHIGH

Privileges requisNONE

Interaction utilisateurNONE

Publie4/16/2026

Derniere modification4/17/2026

Sourcenvd

Observations honeypot0

Faiblesses (CWE)

CWE-177

References

https://cna.openjsf.org/security-advisories.html(ce714d77-add3-4f53-aff5-83d477b104bb)

https://github.com/fastify/fastify-static/security/advisories/GHSA-x428-ghpx-8j92(ce714d77-add3-4f53-aff5-83d477b104bb)

https://github.com/fastify/middie/security/advisories/GHSA-cxrg-g7r8-w69p(ce714d77-add3-4f53-aff5-83d477b104bb)

https://github.com/honojs/hono/security/advisories/GHSA-q5qw-h33p-qvwr(ce714d77-add3-4f53-aff5-83d477b104bb)

Correlations IOC

Aucune correlation enregistree

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