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Priority LOW 27

@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.

CVSS 3.1MEDIUM 5.9 Network No auth No interaction EPSS 0.00422 Published 2026-04-16 Partial fix · 9.1.1 CWE-177