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      <title>CVE-2026-55838 — RustFS: Missing admin authorization on /rustfs/admin/v3/metrics allows any authenticated user to read server metrics</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-55838</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; rustfs&lt;/p&gt;
&lt;p&gt;RustFS is a distributed object storage system built in Rust. In 1.0.0-beta.7 and earlier, the real-time metrics endpoint at /rustfs/admin/v3/metrics is accessible to any valid IAM user regardless of their assigned policy. Every other admin handler in the codebase calls validate_admin_request to enforce admin-action IAM checks; the MetricsHandler skips this call entirely. A restricted IAM user whose policy grants only access to their own bucket can read server-wide operational metrics including disk I/O statistics, network throughput, scanner cycle timing, and cluster RPC state.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; rustfs&lt;/p&gt;
&lt;p&gt;RustFS is a distributed object storage system built in Rust. In 1.0.0-beta.7 and earlier, the real-time metrics endpoint at /rustfs/admin/v3/metrics is accessible to any valid IAM user regardless of their assigned policy. Every other admin handler in the codebase calls validate_admin_request to enforce admin-action IAM checks; the MetricsHandler skips this call entirely. A restricted IAM user whose policy grants only access to their own bucket can read server-wide operational metrics including disk I/O statistics, network throughput, scanner cycle timing, and cluster RPC state.&lt;/p&gt;</content:encoded>
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