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cpe:2.3:a:fastify:middie:*:*:*:*:*:*:*:*

part: a version: * update: *

VendorFastify (51747187-798b-5030-972d-b19db43759b4)
ProductMiddie (086a6872-e962-58c8-8342-7aeccd22cfe4)
Edition*
Language*
Software edition*
Target software*
Target hardware*
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NotesImported from gcve-enriched-dumps CVE data

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Vulnerability references

IdentifiercpeApplicabilitySubmitteddb.gcve.eu detailsRationale
CVE:CVE-2026-22031 vulnerable 2026-06-03 15:15:52.618189 Fastify Middie Middleware Path Bypass
HIGH (8.4)
@fastify/middie is the plugin that adds middleware support on steroids to Fastify. A security vulnerability exists in @fastify/middie prior to version 9.1.0 where middleware registered with a specific path prefix can be bypassed using URL-encoded characters (e.g., `/%61dmin` instead of `/admin`). While the middleware engine fails to match the encoded path and skips execution, the underlying Fastify router correctly decodes the path and matches the route handler, allowing attackers to access protected endpoints without the middleware constraints. Version 9.1.0 fixes the issue.
Published: 2026-01-19T15:24:45.899Z
Updated: 2026-01-20T14:45:31.487Z
Reference links
Imported from gcve-enriched-dumps CVE data

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