VULNERABILITY INTELLIGENCE

CVE-2026-47676

CVSS score5.3 MEDIUM
EPSS probability0.26%
CISA KEVNot currently listed
Published2026-05-28
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-444

Primary references