{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.0.0-beta.7"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "68504577077eb61bf4d83dd234555885840008ad"
            }
          ],
          "repo": "https://github.com/rustfs/rustfs",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-f5cv-v44x-2xgf"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55838.json"
  },
  "details": "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.",
  "id": "CVE-2026-55838",
  "modified": "2026-07-15T01:49:13.291949053Z",
  "published": "2026-06-26T19:57:46.295Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55838.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/rustfs/rustfs/security/advisories/GHSA-f5cv-v44x-2xgf"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55838"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "RustFS: Missing admin authorization on /rustfs/admin/v3/metrics allows any authenticated user to read server metrics"
}