CVE-2026-7120

MEDIUM 5.3

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

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

@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.

CWE	CWE-180
Vendor	@fastify/static
Product	@fastify/static
Published	Jul 23, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

@fastify/static / @fastify/static

0 < 10.1.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/fastify/fastify-static/security/advisories/GHSA-8pvw-jcv7-9cmj cna.openjsf.org: https://cna.openjsf.org/security-advisories.html

Credits

yuki-matsuhashi mcollina UlisesGascon