CVE-2026-7120 @fastify/static vulnerable to Authorization Bypass via Non-Canonical URL Paths
An attacker can bypass allowedPath restrictions in @fastify/static by using non-canonical URL paths, gaining unauthorized read access to restricted files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-7120?
CVE-2026-7120 is a medium-severity authentication bypass vulnerability in @fastify/static, published on 23 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
@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.
Weakness: CWE-180
Which versions are affected by CVE-2026-7120?
2 open source packages ship an affected version, including @fastify/static. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
@fastify/static npm | All versions | 10.1.2 |
@fastify/static npm | All versions | 10.1.2 |
Products include Fastify Fastify-Static.
How do I fix CVE-2026-7120?
Upgrade @fastify/static to 10.1.2 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-7120 being exploited?
There is no known exploitation of CVE-2026-7120 in the wild and no public exploit code.
Other vulnerabilities in @fastify/static
- CVE-2021-22964 DOS and Open Redirect with user input
- CVE-2026-18427 @fastify/static vulnerable to route guard bypass via non-canonical path segments
- CVE-2026-15074 @fastify/static vulnerable to route guard bypass via path traversal
- CVE-2021-22963 URL Redirection to Untrusted Site ('Open Redirect') in fastify-static
- CVE-2026-6414 @fastify/static vulnerable to route guard bypass via encoded path separators
Sources
Also known as GHSA-8pvw-jcv7-9cmj, MINI-mh3f-2r72-757f.