5.9Media
CVE-2026-6414@fastify/static vulnerable to route guard bypass via encoded path separators
Descripción
@fastify/static versions 8.0.0 through 9.1.0 decode percent-encoded path separators (%2F) before filesystem resolution, while Fastify's router treats them as literal characters. This mismatch allows attackers to bypass route-based middleware or guards that protect files served by @fastify/static. For example, a route guard on a protected path can be circumvented by encoding the path separator in the URL. Upgrade to @fastify/static 9.1.1 to fix this issue. There are no workarounds.
Debilidad (CWE):
CWE-177
Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.
Productos y versiones afectados
| Fabricante | Producto | Versiones | |
|---|---|---|---|
| fastify | fastify-static | 8.0.0 – < 9.1.1 | |
| @fastify/static | @fastify/static | 8.0.0 – < 9.1.1, fixed 9.1.1 |
Referencias y parches
- https://github.com/fastify/middie/security/advisories/GHSA-cxrg-g7r8-w69p Not Applicable
- https://github.com/honojs/hono/security/advisories/GHSA-q5qw-h33p-qvwr Not Applicable
- https://github.com/fastify/fastify-static/security/advisories/GHSA-x428-ghpx-8j92 Vendor Advisory
- https://cna.openjsf.org/security-advisories.html Third Party Advisory
Coincidencias CPE (NVD) (1)
cpe:2.3:a:fastify:fastify-static:*:*:*:*:*:*:*:*≥ 8.0.0 < 9.1.1