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    "cveMetadata": {
        "cveId": "CVE-2026-55998",
        "assignerOrgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb",
        "state": "PUBLISHED",
        "assignerShortName": "suse",
        "dateReserved": "2026-06-18T09:26:55.988Z",
        "datePublished": "2026-08-05T07:51:21.731Z",
        "dateUpdated": "2026-08-05T13:13:02.031Z"
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                "shortName": "suse",
                "dateUpdated": "2026-08-05T07:51:21.731Z"
            },
            "title": "Cluster Existence Oracle via Unauthenticated Import Endpoint",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-204",
                            "description": "CWE-204 Observable response discrepancy",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "SUSE",
                    "product": "Rancher",
                    "packageName": "Rancher",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "2.14.0",
                            "lessThan": "2.14.4",
                            "versionType": "semver"
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                            "status": "affected",
                            "version": "2.13.0",
                            "lessThan": "2.13.8",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "2.12.0",
                            "lessThan": "2.12.12",
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                        {
                            "status": "affected",
                            "version": "2.11.0",
                            "lessThan": "2.11.16",
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                    ],
                    "defaultStatus": "unaffected"
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            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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.",
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                            "value": "<p><span>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.</span></p>"
                        }
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                }
            ],
            "references": [
                {
                    "url": "https://github.com/rancher/rancher/security/advisories/GHSA-23h9-rr79-r3gh"
                },
                {
                    "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-55998"
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                        "version": "3.1",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "NONE",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 5.3,
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
                    }
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "This vulnerability was discovered and reported by Michael Wollner (@ibonok) from Deutsche Telekom AG.",
                    "type": "finder"
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
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                                "timestamp": "2026-08-05T13:11:15.281747Z",
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                                        "Exploitation": "none"
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