Uncaught Exception

Overview @fastify/middie is a Middleware engine for Fastify Affected versions of this package are vulnerable to Uncaught Exception in the URL normalization process when handling malformed percent-encoded sequences in incoming request paths. An attacker can cause the Node.js process to terminate...

CVE-2026-14181 @fastify/middie standalone engine vulnerable to Denial of Service via malformed percent-encoded paths

@fastify/middie versions 9.1.0 through 9.3.2 fail to guard the URL normalization step used by the standalone engine when incoming request paths contain malformed percent-encoded sequences. Inputs such as an incomplete percent escape or a truncated multibyte sequence cause the underlying decoder t...

PT-2026-54638

Name of the Vulnerable Software and Affected Versions @fastify/middie versions 9.1.0 through 9.3.2 Description An issue exists in the standalone engine's URL normalization and decoding process where malformed percent-encoded sequences in incoming request paths are not properly guarded...