{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.14.0"
              },
              {
                "fixed": "2.14.4"
              },
              {
                "introduced": "2.13.0"
              },
              {
                "fixed": "2.13.8"
              },
              {
                "introduced": "2.12.0"
              },
              {
                "fixed": "2.12.12"
              },
              {
                "introduced": "2.11.0"
              },
              {
                "fixed": "2.11.16"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "19d8a9c03fde57ab691101dc90a17b92c55f09ad"
            },
            {
              "fixed": "79b003279fec8814d9dc5252c5f6d8100a170348"
            },
            {
              "introduced": "f94ac947f75e312f1ab9217d21b2770b48b734c8"
            },
            {
              "fixed": "853a0e93a1ca67653b80ae9550df98344e4e21c5"
            },
            {
              "introduced": "8815e66bf2e4b528493cf11222f1a63f86305a9f"
            },
            {
              "fixed": "3bc84195ee8855d7426718b4b87988fb6bc14fc0"
            },
            {
              "introduced": "4b8ab8c48d681f77065bf25e1fa502c652b94465"
            },
            {
              "fixed": "e6c19548eded02b0fbc4276d3363bd2bb09930ce"
            }
          ],
          "repo": "https://github.com/rancher/rancher",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-23h9-rr79-r3gh"
  ],
  "database_specific": {
    "cna_assigner": "suse",
    "cwe_ids": [
      "CWE-204"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55998.json"
  },
  "details": "The endpoint /v3/import/{token}_{clusterId}.yaml retrieves the cluster object before validating the token. When a valid cluster ID references a cluster that has private registry secrets configured, a nil pointer dereference in pkg/systemtemplate/private_registry.go causes the request to return HTTP 502 Bad Gateway. For cluster IDs that do not exist, the endpoint returns HTTP 200. This observable difference in response codes constitutes a reliable enumeration oracle.",
  "id": "CVE-2026-55998",
  "modified": "2026-09-03T03:30:20.131042060Z",
  "published": "2026-08-05T07:51:21.731Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55998.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/rancher/rancher/security/advisories/GHSA-23h9-rr79-r3gh"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55998"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-55998"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Cluster Existence Oracle via Unauthenticated Import Endpoint"
}