CVE-2026-7120CWE-180

@fastify/static vulnerable to Authorization Bypass via Non-Canonical URL Paths

Medium · published July 23, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
29.6
In the wild
Unconfirmed
What it is

@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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00369 · 29.6th percentile
Weakness
CWE-180 · Incorrect Behavior Order: Validate Before Canonicalize
Published
2026-07-23T02:48Z
EPSS history
Timeline
  • 23 JUL 02:48Z
    @fastify/static vulnerable to Authorization Bypass via Non-Canonical URL Paths
    cvelistv5