@fastify/middie vulnerabilities

Browse known CVEs and advisories by package and ecosystem. Severity tells you the worst case. What determines real risk is whether the vulnerable code actually runs in your applications.

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CVE-IDSeverityPackage summary

CVE-2026-6270Critical@fastify/middie: @fastify/middie vulnerable to middleware authentication bypass in child plugin scopes CVE-2026-33804High@fastify/middie: @fastify/middie vulnerable to middleware bypass via deprecated ignoreDuplicateSlashes option CVE-2026-2880High@fastify/middie: @fastify/middie has Improper Path Normalization when Using Path-Scoped Middleware CVE-2026-22031High@fastify/middie: Fastify Middie Middleware Path Bypass

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