MEDIUM🇵🇱 Wersja polska

CVE-2026-6414

CVSS 5.9v3.1pub. 2026-04-16upd. 2026-04-23

@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.

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

  • Fastify Static

    APP
    Fastify
    8.0.0 – 9.1.1 (bez)
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CHECK WITH VENDOR
No clear patch data available. Check vendor references.
CWE
References

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