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HIGH 7.5

GHSA-9hp6-4448-45g2

Hono's flaw in URL path parsing could cause path confusion

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### 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.

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영향 패키지

npm / hono
최초 영향 버전: 4.8.0 수정 버전: 4.9.6
수정 npm install hono@4.9.6

참고