Over-inclusive team membership expansion in GitHub App authentication provider for Rancher

{
  "id": "502e483590191df8e885a97c6d0cc233747622a793e87985634d975eeee2aa66",
  "url": "https://osv.dev/vulnerability/CVE-2026-41053",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Over-inclusive team membership expansion in GitHub App authentication provider for Rancher",
    "summary": "Incorrect authentication caching in the team member ship expansion of the Rancher Github authentication provider caused it granting principal access to any logged in user, in 2.13 before 2.13.6 and 2.14 before 2.14.2.",
    "evidence": "osv:CVE-2026-41053",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-41053",
      "aliases": [
        "CVE-2026-41053",
        "GHSA-4j6x-2764-m8gh",
        "GO-2026-5869"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/rancher/rancher",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f94ac947f75e312f1ab9217d21b2770b48b734c8"
                },
                {
                  "fixed": "93a5abcbed0d07643e1cb9d2f642eeac65a14377"
                },
                {
                  "introduced": "19d8a9c03fde57ab691101dc90a17b92c55f09ad"
                },
                {
                  "fixed": "1bb24fe965ab9a801cd28447cc97df28db58cbd9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.13.0"
                      },
                      {
                        "fixed": "2.13.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.14.0"
                      },
                      {
                        "fixed": "2.14.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.13.3",
            "v2.14.2-rc1",
            "v2.13.6-rc1",
            "v2.14.2-alpha8",
            "v2.13.6-alpha6",
            "v2.14.2-alpha7",
            "v2.14.2-alpha6",
            "v2.13.6-alpha5",
            "v2.14.2-alpha5",
            "v2.14.2-alpha4",
            "v2.14.1-alpha14",
            "v2.13.6-alpha4",
            "v2.14.2-alpha3",
            "v2.13.6-alpha3",
            "v2.13.6-alpha2",
            "v2.14.2-alpha2",
            "v2.13.6-alpha1",
            "v2.14.2-alpha1",
            "v2.14.1",
            "v2.13.5",
            "v2.14.1-rc2",
            "v2.14.1-rc1",
            "v2.13.5-rc1",
            "v2.14.1-alpha13",
            "v2.14.1-alpha12",
            "v2.13.5-alpha7",
            "v2.14.1-alpha11",
            "v2.14.1-alpha10",
            "v2.14.1-alpha9",
            "v2.14.1-alpha8",
            "v2.13.5-alpha6",
            "v2.14.1-alpha7",
            "v2.14.1-alpha6",
            "v2.14.1-alpha5",
            "v2.13.5-alpha5",
            "v2.13.5-alpha4",
            "v2.14.1-alpha4",
            "v2.13.5-alpha3",
            "v2.14.1-alpha3",
            "v2.13.5-alpha2",
            "v2.13.5-alpha1",
            "v2.14.1-alpha2",
            "v2.14.1-alpha1",
            "v2.14.0",
            "v2.13.4",
            "v2.13.4-rc1",
            "v2.13.4-alpha5",
            "v2.13.4-alpha4",
            "v2.13.4-alpha3",
            "v2.13.4-alpha2",
            "v2.13.4-alpha1",
            "v2.13.3-rc3",
            "v2.13.3-rc2",
            "v2.13.3-rc1",
            "v2.13.3-alpha6",
            "v2.13.3-alpha5",
            "v2.13.3-alpha4",
            "v2.13.3-alpha3",
            "v2.13.3-alpha2",
            "v2.13.3-alpha1",
            "v2.13.2-rc2",
            "v2.13.2",
            "v2.13.2-rc1",
            "v2.13.2-alpha7",
            "v2.13.2-alpha6",
            "v2.13.2-alpha5",
            "v2.13.2-alpha4",
            "v2.13.2-alpha3",
            "v2.13.2-alpha2",
            "v2.13.2-alpha1",
            "v2.13.1",
            "v2.13.1-rc1",
            "v2.13.1-alpha7",
            "v2.13.1-alpha6",
            "v2.13.1-alpha5",
            "v2.13.1-alpha4",
            "v2.13.1-alpha3",
            "v2.13.1-alpha2",
            "v2.13.1-alpha1",
            "v2.13.0-rc4",
            "v2.13.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41053.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.147233178Z",
      "provider": "osv",
      "references": [
        "https://github.com/rancher/rancher/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41053.json",
        "https://github.com/rancher/rancher/security/advisories/GHSA-4j6x-2764-m8gh",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-41053"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-303"
        ],
        "cna_assigner": "suse",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41053.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-41053",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492035,
  "published_at": "2026-06-30T11:38:25.06+00:00"
}