{"dataType": "CVE_RECORD", "dataVersion": "5.2", "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": "2026-08-05T07:51:21.731Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb", "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"}, {"status": "affected", "version": "2.13.0", "lessThan": "2.13.8", "versionType": "semver"}, {"status": "affected", "version": "2.12.0", "lessThan": "2.12.12", "versionType": "semver"}, {"status": "affected", "version": "2.11.0", "lessThan": "2.11.16", "versionType": "semver"}], "defaultStatus": "unaffected"}], "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.", "supportingMedia": [{"type": "text/html", "base64": false, "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>"}]}], "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"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"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"}, "x_generator": {"engine": "Vulnogram 1.0.4"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.14.0,2.14.4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.13.0,2.13.8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.12.0,2.12.12)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.11.0,2.11.16)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Rancher", "source": "cna", "vendor": "SUSE"}, "product": "rancher", "vendor": "suse"}], "created": "2026-08-05T09:30:11.604732+00:00", "updated": "2026-08-05T10:00:03.414321+00:00", "vendors": ["suse", "suse$PRODUCT$rancher"]}