{"id":"CVE-2026-55998","summary":"Cluster Existence Oracle via Unauthenticated Import Endpoint","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.","aliases":["GHSA-23h9-rr79-r3gh"],"modified":"2026-09-03T03:30:20.131042060Z","published":"2026-08-05T07:51:21.731Z","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"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rancher/rancher","events":[{"introduced":"19d8a9c03fde57ab691101dc90a17b92c55f09ad"},{"fixed":"79b003279fec8814d9dc5252c5f6d8100a170348"},{"introduced":"f94ac947f75e312f1ab9217d21b2770b48b734c8"},{"fixed":"853a0e93a1ca67653b80ae9550df98344e4e21c5"},{"introduced":"8815e66bf2e4b528493cf11222f1a63f86305a9f"},{"fixed":"3bc84195ee8855d7426718b4b87988fb6bc14fc0"},{"introduced":"4b8ab8c48d681f77065bf25e1fa502c652b94465"},{"fixed":"e6c19548eded02b0fbc4276d3363bd2bb09930ce"}],"database_specific":{"source":"AFFECTED_FIELD","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"}]}}],"versions":["v2.11.16-rc1","v2.13.8-rc1","v2.12.12-rc1","v2.14.4-rc1","v2.14.4-alpha7","v2.13.8-alpha8","v2.12.12-alpha9","v2.11.16-alpha6","v2.12.12-alpha8","v2.14.4-alpha6","v2.13.8-alpha7","v2.12.12-alpha7","v2.14.3","v2.13.8-alpha6","v2.12.12-alpha6","v2.11.16-alpha5","v2.11.16-alpha4","v2.14.4-alpha5","v2.14.4-alpha4","v2.14.4-alpha3","v2.13.8-alpha5","v2.12.12-alpha5","v2.13.8-alpha4","v2.11.16-alpha3","v2.12.12-alpha4","v2.12.12-alpha3","v2.14.4-alpha2","v2.13.8-alpha3","v2.12.12-alpha2","v2.11.16-alpha2","v2.13.8-alpha2","v2.13.3","v2.11.16-alpha1","v2.12.12-alpha1","v2.13.8-alpha1","v2.14.4-alpha1","v2.11.15","v2.12.11","v2.13.7","v2.12.11-rc1","v2.14.3-rc1","v2.11.15-rc1","v2.11.15-alpha4","v2.13.7-rc1","v2.12.11-alpha5","v2.14.2","v2.14.3-alpha6","v2.13.7-alpha7","v2.11.15-alpha3","v2.12.11-alpha4","v2.13.7-alpha6","v2.11.15-alpha2","v2.13.7-alpha5","v2.12.11-alpha3","v2.14.3-alpha5","v2.13.7-alpha4","v2.14.3-alpha4","v2.11.15-alpha1","v2.12.11-alpha2","v2.12.11-alpha1","v2.14.3-alpha3","v2.13.7-alpha3","v2.14.3-alpha2","v2.13.7-alpha2","v2.13.7-alpha1","v2.14.3-alpha1","v2.11.14","v2.12.10","v2.13.6","v2.14.2-rc1","v2.12.10-rc1","v2.11.14-rc1","v2.13.6-rc1","v2.14.2-alpha8","v2.13.6-alpha6","v2.14.2-alpha7","v2.11.14-alpha1","v2.14.2-alpha6","v2.12.10-alpha5","v2.12.10-alpha4","v2.13.6-alpha5","v2.14.2-alpha5","v2.14.2-alpha4","v2.14.1-alpha14","v2.12.10-alpha3","v2.13.6-alpha4","v2.14.2-alpha3","v2.13.6-alpha3","v2.13.6-alpha2","v2.12.10-alpha2","v2.14.2-alpha2","v2.12.10-alpha1","v2.13.6-alpha1","v2.14.2-alpha1","v2.14.1","v2.11.13","v2.13.5","v2.12.9","v2.14.1-rc2","v2.14.1-rc1","v2.13.5-rc1","v2.12.9-rc1","v2.14.1-alpha13","v2.14.1-alpha12","v2.11.13-rc1","v2.11.13-alpha6","v2.12.9-alpha7","v2.13.5-alpha7","v2.14.1-alpha11","v2.14.1-alpha10","v2.14.1-alpha9","v2.14.1-alpha8","v2.11.13-alpha5","v2.13.5-alpha6","v2.12.9-alpha6","v2.14.1-alpha7","v2.14.1-alpha6","v2.14.1-alpha5","v2.13.5-alpha5","v2.12.9-alpha5","v2.11.13-alpha4","v2.11.13-alpha3","v2.11.13-alpha2","v2.12.9-alpha4","v2.13.5-alpha4","v2.14.1-alpha4","v2.12.9-alpha3","v2.13.5-alpha3","v2.14.1-alpha3","v2.11.13-alpha1","v2.13.5-alpha2","v2.12.9-alpha2","v2.12.9-alpha1","v2.13.5-alpha1","v2.14.1-alpha2","v2.14.1-alpha1","v2.11.12","v2.12.8","v2.14.0","v2.13.4","v2.11.12-rc1","v2.13.4-rc1","v2.12.8-rc1","v2.13.4-alpha5","v2.13.4-alpha4","v2.13.4-alpha3","v2.13.4-alpha2","v2.12.8-alpha2","v2.11.12-alpha1","v2.13.4-alpha1","v2.12.8-alpha1","v2.12.7","v2.11.11","v2.12.7-rc1","v2.11.11-rc1","v2.13.3-rc3","v2.13.3-rc2","v2.13.3-rc1","v2.13.3-alpha6","v2.13.3-alpha5","v2.12.7-alpha3","v2.11.11-alpha2","v2.12.7-alpha2","v2.13.3-alpha4","v2.13.3-alpha3","v2.13.3-alpha2","v2.11.11-alpha1","v2.13.3-alpha1","v2.12.7-alpha1","v2.11.10-rc2","v2.11.10","v2.13.2-rc2","v2.13.2","v2.12.6-rc2","v2.12.6","v2.11.10-rc1","v2.12.6-rc1","v2.13.2-rc1","v2.13.2-alpha7","v2.13.2-alpha6","v2.12.6-alpha2","v2.13.2-alpha5","v2.11.10-alpha1","v2.12.5","v2.12.6-alpha1","v2.11.9-alpha2","v2.13.2-alpha4","v2.13.2-alpha3","v2.13.2-alpha2","v2.13.2-alpha1","v2.12.4-hotfix-a3c0.1","v2.12.4","v2.11.9","v2.13.1","v2.12.5-rc1","v2.11.9-rc1","v2.13.1-rc1","v2.13.1-alpha7","v2.13.1-alpha6","v2.13.1-alpha5","v2.13.1-alpha4","v2.11.9-alpha1","v2.13.1-alpha3","v2.13.1-alpha2","v2.12.5-alpha2","v2.13.1-alpha1","v2.12.5-alpha1","v2.11.8","v2.13.0-rc4","v2.13.0","v2.12.4-rc1","v2.11.8-rc1","v2.11.8-alpha5","v2.11.8-alpha4","v2.12.4-alpha6","v2.11.8-alpha3","v2.12.4-alpha5","v2.11.8-alpha2","v2.12.4-alpha4","v2.12.4-alpha3","v2.11.8-al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