AIKIDO-2026-221297
@fastify/static is vulnerable to Path Traversal
75
CVE Score
High
Path Traversal
TL;DR
@fastify/static is vulnerable to a bypass of route-based middleware and guards via non-canonical . and // path segments. This lets an unauthenticated request read files in the static root that a route guard was meant to protect, defeating route-level authorization. The fix canonicalizes the pathname used for routing and serving, including rejecting backslashes.
How do I fix this?
Upgrade the @fastify/static library to the patch version.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you rely on route-based middleware or guards to protect files served by @fastify/static.
Package
Versions
0.0.1 - 10.1.2
Fixed in 10.1.3Background info
@fastify/static is vulnerable to Path Traversal in versions 0.0.1 - 10.1.2.
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