CVE-2026-47676Medium· 5.3▾ SunlitHono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, app.mount() strips the mount prefix from the incoming request path using the raw URL pathname, while route matching is performed agai…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 29.2 · likelihood 0.1 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, app.mount() strips the mount prefix from the incoming request path using the raw URL pathname, while route matching is performed against the percent-decoded path. This inconsistency causes the prefix to be stripped at the wrong position when the path contains percent-encoded multi-byte characters, resulting in the mounted sub-application receiving an incorrect path. This vulnerability is fixed in 4.12.21.
hono < 4.12.21Upgrade past the affected range:
hono 4.12.21Connected by shared product, vendor, weakness, or advisory.
CVE-2025-71381Medium· 6.5Hono before 4.10.2 (fixed in 4.10.3) contains a flaw in its CORS middleware: when the origin is not set to "*", the middleware copies the Vary header from the incoming request into the response
CVE-2026-84363Medium· 5.9Hono is a Web application framework that provides support for any JavaScript runtime
CVE-2026-47673Medium· 4.8Hono is a Web application framework that provides support for any JavaScript runtime
CVE-2026-47674Medium· 5.3Hono is a Web application framework that provides support for any JavaScript runtime
CVE-2026-47675Medium· 4.3Hono is a Web application framework that provides support for any JavaScript runtime
CVE-2026-109955Medium· 5.3Hono 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