GHSA-9hp6-4448-45g2
Hono's flaw in URL path parsing could cause path confusion
Details
### Summary
A flaw in the `getPath` utility function could allow path confusion and potential bypass of proxy-level ACLs (e.g. Nginx location blocks).
### Details
The original implementation relied on fixed character offsets when parsing request URLs. Under certain malformed absolute-form Request-URIs, this could lead to incorrect path extraction.
Most standards-compliant runtimes and reverse proxies reject such malformed requests with a 400 Bad Request, so the impact depends on the application and environment.
### Impact
If proxy ACLs are used to protect sensitive endpoints such as `/admin`, this flaw could have allowed unauthorized access. The confidentiality impact depends on what data is exposed: if sensitive administrative data is exposed, the impact may be High (CVSS 7.5); otherwise it may be Medium (CVSS 5.3).
### Resolution
The implementation has been updated to correctly locate the first slash after "://", preventing such path confusion.
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://github.com/honojs/hono/security/advisories/GHSA-9hp6-4448-45g2 [WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2025-58362 [ADVISORY]
- https://github.com/honojs/hono/commit/1d79aedc3f82d8c9969b115fe61bc4bd705ec8de [WEB]
- https://github.com/honojs/hono [PACKAGE]
- https://github.com/honojs/hono/releases/tag/v4.9.6 [WEB]