CVE-2026-6270

@fastify/middie versions 9.3.1 and earlier do not register inherited middleware directly on child plugin engine instances. When a Fastify application registers authentication middleware in a parent scope and then registers child plugins with @fastify/middie, the child scope does not inherit the...

PT-2026-33323

Name of the Vulnerable Software and Affected Versions @fastify/middie versions prior to 9.3.2 Description A middleware bypass exists when the deprecated ignoreDuplicateSlashes option is enabled. The middleware path matching logic fails to account for duplicate slash normalization performed by the...