Hono: Cache Middleware ignores Vary: Authorization / Vary: Cookie leading to cross-user cache leakage
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Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.18, Cache Middleware does not skip caching for responses that declare per-user variance via Vary: Authorization or Vary: Cookie. As a result, a response cached for one authenticated user may be served to subsequent requests from different users. This vulnerability is fixed in 4.12.18.
No remediation guidance has been written for this CVE yet. What the record does show:
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