CVE-2026-85184

Description

@fastify/middie versions >= 9.1.0 and before 9.3.4 decide whether to run path-scoped middleware by matching against the raw request target, while the Fastify router resolves an absolute-form request target to its path before dispatching. Because the two layers evaluate different strings, a request using an absolute-form target reaches the route handler while the path-scoped middleware, such as authentication or authorization, is skipped. An unauthenticated network attacker can use this to bypass path-based access controls in a Fastify application that relies on middie for those controls. Users should upgrade to @fastify/middie 9.3.4 or later.

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Produits concernés

• @fastify/middie
• Fastify fastify\/middie

Scores CVSS

Faiblesses (CWE)

• CWE-436

Références

• https://cna.openjsf.org/security-advisories.html Third Party Advisory
• https://github.com/fastify/middie/security/advisories/GHSA-hx87-8wv7-pjv8 MitigationVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories