FKIE_CVE-2026-44945

Vulnerability from fkie_nvd - Published: 2026-08-05 10:17 - Updated: 2026-08-06 05:17
Severity
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Summary
A privilege escalation vulnerability exists in Rancher's impersonation middleware (pkg/auth/requests/impersonate.go). An authenticated Rancher user with the default user global role can gain full administrative access to the Rancher control plane and transitively to all downstream clusters it manages. This issue affects Rancher: from 2.11.0 before 2.11.16, from 2.12.0 before 2.12.12, from 2.13.0 before 2.13.8, and from 2.14.0 before 2.14.2.
References
meissner@suse.dehttps://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-44945
meissner@suse.dehttps://github.com/rancher/rancher/pull/55983
meissner@suse.dehttps://github.com/rancher/rancher/security/advisories/GHSA-v584-7w32-jwpq
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageName": "Rancher",
          "product": "Rancher",
          "repo": "https://github.com/rancher/rancher",
          "vendor": "SUSE",
          "versions": [
            {
              "changes": [
                {
                  "at": "2.11.16",
                  "status": "unaffected"
                }
              ],
              "lessThan": "2.11.16",
              "status": "affected",
              "version": "2.11.0",
              "versionType": "semver"
            },
            {
              "changes": [
                {
                  "at": "2.12.12",
                  "status": "unaffected"
                }
              ],
              "lessThan": "2.12.12",
              "status": "affected",
              "version": "2.12.0",
              "versionType": "semver"
            },
            {
              "changes": [
                {
                  "at": "2.13.8",
                  "status": "unaffected"
                }
              ],
              "lessThan": "2.13.8",
              "status": "affected",
              "version": "2.13.0",
              "versionType": "semver"
            },
            {
              "changes": [
                {
                  "at": "2.14.4",
                  "status": "unaffected"
                }
              ],
              "lessThan": "2.14.2",
              "status": "affected",
              "version": "2.14.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "meissner@suse.de"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A privilege escalation vulnerability exists in Rancher\u0027s impersonation middleware (pkg/auth/requests/impersonate.go). An authenticated Rancher user with the default user\n global role can gain full administrative access to the Rancher control \nplane and transitively to all downstream clusters it manages.\n\nThis issue affects Rancher: from 2.11.0 before 2.11.16, from 2.12.0 before 2.12.12, from 2.13.0 before 2.13.8, and from 2.14.0 before 2.14.2."
    }
  ],
  "id": "CVE-2026-44945",
  "lastModified": "2026-08-06T05:17:03.793",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 6.0,
        "source": "meissner@suse.de",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-44945",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-05T00:00:00+00:00",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-05T10:17:27.460",
  "references": [
    {
      "source": "meissner@suse.de",
      "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-44945"
    },
    {
      "source": "meissner@suse.de",
      "url": "https://github.com/rancher/rancher/pull/55983"
    },
    {
      "source": "meissner@suse.de",
      "url": "https://github.com/rancher/rancher/security/advisories/GHSA-v584-7w32-jwpq"
    }
  ],
  "sourceIdentifier": "meissner@suse.de",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-441"
        },
        {
          "lang": "en",
          "value": "CWE-497"
        }
      ],
      "source": "meissner@suse.de",
      "type": "Secondary"
    }
  ]
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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