Directory Traversal

Overview @fastify/http-proxy is a proxy http requests, for Fastify Affected versions of this package are vulnerable to Directory Traversal through the HTTP request path handling in index.js, including fastifyHttpProxy and reply.fromParameters. An attacker can bypass rewritePrefix path restriction...

CVE-2026-16117: Improper Input Validation

Impact: @fastify/http-proxy versions up to and including 11.5.0 fail to rewrite the request prefix when the prefix segment is URL-encoded. Fastify's router URL-decodes paths for route matching, but request.url retains the original encoded form, and the prefix-rewrite step uses a literal string...