FKIE_CVE-2026-93538

Vulnerability from fkie_nvd - Published: 2026-09-28 15:17 - Updated: 2026-09-29 21:32
Severity
7.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Summary
A cross-tenant authorization issue was discovered in SUSE Rancher Fleet. During agent-initiated cluster registration, cluster labels supplied by the registering agent, including labels in the reserved management.cattle.io/ namespace such as the cluster display name label, were applied to the resulting upstream Cluster object. Because Fleet resolves GitRepo and Bundle targets from those cluster labels, a party able to register a cluster into a Fleet workspace namespace shared with other tenants could cause its own cluster to satisfy targeting rules that administrators intended for a different cluster. This affects SUSE Rancher Fleet 0.16 before 0.16.1, 0.15 before 0.15.6, 0.14 before 0.14.10, 0.13 before 0.13.15, 0.12 before 0.12.19 and older versions.
References
meissner@suse.dehttps://github.com/rancher/fleet/security/advisories/GHSA-h9p5-fp5h-qpqr
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageName": "Fleet",
          "product": "Rancher",
          "repo": "https://github.com/rancher/fleet/",
          "vendor": "SUSE",
          "versions": [
            {
              "lessThan": "0.16.1",
              "status": "affected",
              "version": "0.16.0",
              "versionType": "semver"
            },
            {
              "lessThan": "0.15.6",
              "status": "affected",
              "version": "0.15.0",
              "versionType": "semver"
            },
            {
              "lessThan": "0.14.10",
              "status": "affected",
              "version": "0.14.0",
              "versionType": "semver"
            },
            {
              "lessThan": "0.13.15",
              "status": "affected",
              "version": "0.13.0",
              "versionType": "semver"
            },
            {
              "lessThan": "0.12.19",
              "status": "affected",
              "version": "0.12.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "meissner@suse.de"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A cross-tenant authorization issue was discovered in SUSE Rancher Fleet. During agent-initiated\u00a0cluster registration, cluster labels supplied by the registering agent, including labels in the reserved management.cattle.io/ namespace such as the cluster display name label, were applied to the resulting upstream Cluster object. Because Fleet resolves GitRepo and Bundle targets from those cluster labels, a party able to register a cluster into a Fleet workspace namespace shared with other tenants could cause its own cluster to satisfy targeting rules that administrators intended for a different cluster.\nThis affects SUSE Rancher Fleet 0.16 before 0.16.1, 0.15 before 0.15.6, 0.14 before 0.14.10, 0.13 before 0.13.15, 0.12 before 0.12.19 and older versions."
    }
  ],
  "id": "CVE-2026-93538",
  "lastModified": "2026-09-29T21:32:59.833",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.2,
        "source": "meissner@suse.de",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-93538",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-28T15:46:41.479078Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-28T15:17:24.927",
  "references": [
    {
      "source": "meissner@suse.de",
      "url": "https://github.com/rancher/fleet/security/advisories/GHSA-h9p5-fp5h-qpqr"
    }
  ],
  "sourceIdentifier": "meissner@suse.de",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-290"
        },
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ],
      "source": "meissner@suse.de",
      "type": "Secondary"
    }
  ]
}



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