@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 parent middleware. This allows unauthenticated requests to reach routes defined in child plugin scopes, bypassing authentication and authorization checks.
Upgrade to @fastify/middie 9.3.2 to fix this issue. There are no workarounds.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 3
https://cna.openjsf.org/security-advisories.html
ce714d77-add3-4f53-aff5-83d477b104bb
https://github.com/fastify/fastify-express/security/advisories/GHSA-hrwm-hgmj-7…
ce714d77-add3-4f53-aff5-83d477b104bb
https://github.com/fastify/middie/security/advisories/GHSA-72c6-fx6q-fr5w
ce714d77-add3-4f53-aff5-83d477b104bb