{"id":"CVE-2026-55998","published":"2026-08-05T08:16:34.460","lastModified":"2026-08-05T14:17:08.113","description":"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.","cvssScore":5.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cwes":["CWE-204"],"vendors":[],"products":[],"references":[{"url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-55998","tags":[]},{"url":"https://github.com/rancher/rancher/security/advisories/GHSA-23h9-rr79-r3gh","tags":[]}],"exploitRefs":[{"url":"https://github.com/rancher/rancher/security/advisories/GHSA-23h9-rr79-r3gh","tags":[]}],"hasPoc":true,"ai":null}