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6.9 Medium

CVE-2026-109955 Hono from 4.12.4 before 4.13.11 contains a middleware bypass vulnerability in serveStatic that allows unauthenticated…

Description

Hono from 4.12.4 before 4.13.11 contains a middleware bypass vulnerability in serveStatic that allows unauthenticated attackers to skip prefix middleware by exploiting double path decoding. Attackers can send malformed percent-encoded paths that the router matches in encoded form, reaching static files without authentication checks running.

Affected products and versions

Product Affected versions Fixed in
hono 4.13 earliest → < 4.13.11 4.13.11
hono 4.12 4.12.4 → < 4.13.11 4.13.11

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