FKIE_CVE-2026-73285

Vulnerability from fkie_nvd - Published: 2026-08-12 15:18 - Updated: 2026-08-12 15:18
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
RustFS is a distributed object storage system built in Rust. From 1.0.0-alpha.64 until 1.0.0-rc.1, RustFS external OPA authorization enabled by RUSTFS_POLICY_PLUGIN_URL in crates/iam/src/sys.rs sets PreparedIamAuth.needs_existing_object_tag incorrectly for PreparedIamMode::Opa, causing maybe_merge_object_tag_conditions to omit s3:ExistingObjectTag/* values and allowing authenticated users to bypass tag-based policy restrictions. This issue is fixed in version 1.0.0-rc.1.
References
security-advisories@github.comhttps://github.com/rustfs/rustfs/blob/380ed40b471887014fe21d069b61df9eacca074b/.agents/skills/security-advisory-lessons/references/advisory-patterns.md?plain=1#L47
security-advisories@github.comhttps://github.com/rustfs/rustfs/commit/98d3619613722308498494d412797a52ea8ae64d
security-advisories@github.comhttps://github.com/rustfs/rustfs/releases/tag/1.0.0-rc.1
security-advisories@github.comhttps://github.com/rustfs/rustfs/security/advisories/GHSA-5w8r-p896-6vq2
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/rustfs/rustfs/security/advisories/GHSA-5w8r-p896-6vq2
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "rustfs",
          "vendor": "rustfs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.0.0-alpha.64, \u003c 1.0.0-rc.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "RustFS is a distributed object storage system built in Rust. From 1.0.0-alpha.64 until 1.0.0-rc.1, RustFS external OPA authorization enabled by RUSTFS_POLICY_PLUGIN_URL in crates/iam/src/sys.rs sets PreparedIamAuth.needs_existing_object_tag incorrectly for PreparedIamMode::Opa, causing maybe_merge_object_tag_conditions to omit s3:ExistingObjectTag/* values and allowing authenticated users to bypass tag-based policy restrictions. This issue is fixed in version 1.0.0-rc.1."
    }
  ],
  "id": "CVE-2026-73285",
  "lastModified": "2026-08-12T15:18:31.840",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-73285",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-12T15:07:58.760961Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-12T15:18:31.840",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/rustfs/rustfs/blob/380ed40b471887014fe21d069b61df9eacca074b/.agents/skills/security-advisory-lessons/references/advisory-patterns.md?plain=1#L47"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/rustfs/rustfs/commit/98d3619613722308498494d412797a52ea8ae64d"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/rustfs/rustfs/releases/tag/1.0.0-rc.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/rustfs/rustfs/security/advisories/GHSA-5w8r-p896-6vq2"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/rustfs/rustfs/security/advisories/GHSA-5w8r-p896-6vq2"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}



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