CVE-2026-7120: Fastify Fastify-Static

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

@fastify/static evaluates the allowedPath callback before normalizing dot segments and duplicate path separators in the pathname used for file resolution. Versions up to and including 10.1.1 are affected. An unauthenticated attacker can bypass allowedPath restrictions by requesting equivalent non-canonical pathnames, causing files that were intended to be denied to be served anyway. The bypass does not allow access outside the configured static root by itself, it defeats path-based filtering only. The issue is patched in @fastify/static 10.1.2.

Affected products

• Fastify Fastify-Static: before 10.1.2 (fixed in 10.1.2)

Published 2026-07-23. Last modified 2026-07-28.