{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "1.0.0-alpha.1"
              },
              {
                "last_affected": "1.0.0-beta.8"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "6a5fbe7ef112c77cc285dcdacfffbee28a76e4a9"
            },
            {
              "last_affected": "03eb10b07f5f968c531151ae667dfe218050493d"
            }
          ],
          "repo": "https://github.com/rustfs/rustfs",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-3g29-xff2-92vp"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-862",
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55189.json"
  },
  "details": "RustFS is a distributed object storage system built in Rust. From 1.0.0-alpha.1 until 1.0.0-beta.9, when the FTP frontend is enabled, the FTP read and probe handlers dispatch directly to the storage backend without ever calling the IAM authorization function that the FTP write/list handlers (and the entire HTTP S3 path) use. As a result, any user who can authenticate to the FTP listener — including a user whose IAM policy contains an explicit Deny on s3:GetObject — can read (RETR) and stat (SIZE/MDTM) any object in any bucket, and probe any bucket (CWD), completely regardless of their IAM policy. This vulnerability is fixed in 1.0.0-beta.9.",
  "id": "CVE-2026-55189",
  "modified": "2026-07-15T01:48:55.167435797Z",
  "published": "2026-06-26T19:59:13.870Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55189.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/rustfs/rustfs/security/advisories/GHSA-3g29-xff2-92vp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55189"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "RustFS: FTP frontend skips IAM authorization on object reads"
}