CVE-2026-29087CWE-863

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

High · published March 6, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
36.1
In the wild
Unconfirmed
What it is

@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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00429 · 36.1th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-03-06T17:03Z
EPSS history
Timeline
  • 06 MAR 17:03Z
    @hono/node-server: Authorization bypass for protected static paths via encoded slashes in Serve Static Middleware
    cvelistv5