Detections
Analytics
CVE-2026-29045
high
Description
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, when using serveStatic together with route-based middleware protections (e.g. app.use('/admin/*', ...)), inconsistent URL decoding allowed protected static resources to be accessed without authorization. The router used decodeURI, while serveStatic used decodeURIComponent. This mismatch allowed paths containing encoded slashes (%2F) to bypass middleware protections while still resolving to the intended filesystem path. This issue has been patched in version 4.12.4.
References
https://github.com/honojs/hono/security/advisories/GHSA-q5qw-h33p-qvwr
https://github.com/honojs/hono/commit/6a0607a929d888893f0c91d92dce2fcfdb3662a3