Description (CNA)
fastify versions before 5.12.2 decide whether to compile a request schema based on JavaScript truthiness, but JSON Schema Draft 7 defines the boolean false as a valid schema that rejects every instance. When an application assigns false to a route's body, querystring, params, or headers schema to deny all input, fastify treats it as a missing schema, compiles no validator, and runs the route handler on any request. An unauthenticated remote client can therefore reach a handler that a valid deny-all schema was intended to make unreachable, a complete validation bypass that can lead to unauthorized state changes or execution of disabled operations. Users should upgrade to fastify 5.12.2 or later.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| fastify / fastify | affected 0 before 5.12.2; unaffected 5.12.2 |
CWE
CWE-20
References
- https://github.com/fastify/fastify/security/advisories/GHSA-hwr6-493r-vm6h
- https://cna.openjsf.org/security-advisories.html
ADP enrichment
No English description supplied.
No references supplied.