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      <title>CVE-2026-54286 — Hono: Path traversal in `serve-static` on Windows via encoded backslash (`%5C`)</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-54286</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; honojs hono&lt;/p&gt;
&lt;p&gt;Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on Windows hosts, an encoded backslash (%5C) in the request path decodes to \, which the Windows path resolver treats as a separator. serve-static then resolves a single URL segment such as admin\secret.txt into a nested file under the root and serves it, letting an attacker read static files meant to be protected behind prefix-mounted middleware. This vulnerability is fixed in 4.12.25.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; honojs hono&lt;/p&gt;
&lt;p&gt;Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on Windows hosts, an encoded backslash (%5C) in the request path decodes to \, which the Windows path resolver treats as a separator. serve-static then resolves a single URL segment such as admin\secret.txt into a nested file under the root and serves it, letting an attacker read static files meant to be protected behind prefix-mounted middleware. This vulnerability is fixed in 4.12.25.&lt;/p&gt;</content:encoded>
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