PatchTheCVECVE-2026-7120: @fastify/static evaluates the allowedPath callback before normalizing dot segments and duplicate path separato
CVE-2026-7120 is a medium-severity flaw (CVSS 5.3) affecting fastify-static. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
@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 r
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 69%) |
| CISA exploited list | No |
| Weakness | CWE-180 |
| Published | 2026-07-23 |
| Last modified | 2026-07-28 |
Last updated 2026-07-28 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-7120?
fastify-static: upgrade to 10.1.2. Exact commands for each OS are on this page.
Is CVE-2026-7120 being exploited?
CVE-2026-7120 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-7120 affect?
CVE-2026-7120 affects fastify-static. Severity is medium (CVSS 5.3). @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 byp
How urgent is CVE-2026-7120?
Priority 31/100. Remotely exploitable, no login, no user action
Related CVEs
- CVE-2026-18427 HIGH 7.5 UPGRADE @fastify/static before version 10.1.3 contains an incomplete fix for a previous route guard bypass
- CVE-2026-15074 HIGH 7.5 UPGRADE @fastify/static up to and including version 10.1.0 fails to reject dot-dot path segments in request pathnames