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HIGHCVE-2026-29087Published Modified CNA GitHub_M

CVE-2026-29087: @hono/node-server: Authorization bypass for protected static paths via encoded slashes in Serve Static Middleware

@hono/node-server allows running the Hono application on Node.js. Prior to version 1.19.10, when using @hono/node-server's static file serving together with route-based middleware protections (e.g. protecting /admin/*), inconsistent URL decoding can allow protected static resources to be accessed without authorization. In particular, paths containing encoded slashes (%2F) may be evaluated differently by routing/middleware matching versus static file path resolution, enabling a bypass where middleware does not run but the static file is still served. This issue has been patched in version 1.19.10.

Metrics

CVSS v3.1
7.5
Severity
HIGH
Fixed in
Affected Products
1
Affected packages
  • honojs / node-server
    < 1.19.10
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N