{"id":"CVE-2026-71208","summary":"KubeSphere - SSRF via Unvalidated Cluster CRD Connection Endpoint in Cluster Reconciliation","details":"KubeSphere's cluster-controller reconciliation (pkg/utils/clusterclient/clusterclient.go, addCluster) processes every Cluster custom resource's connection configuration and immediately calls Discovery.ServerVersion against the CRD-specified Kubernetes API endpoint, which is parsed only for URL syntax (url.Parse) with no allow/deny-list for loopback, RFC1918 private ranges, link-local, or cloud-metadata addresses (e.g. 169.254.169.254).","modified":"2026-08-28T11:30:16.174603646Z","published":"2026-08-05T06:59:13.308Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71208.json","cna_assigner":"TuranSec","cwe_ids":["CWE-918"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71208.json"},{"type":"ADVISORY","url":"https://github.com/ashikmd7/kubeSphere/blob/main/SSRF%20via%20Cluster%20CRD%20KubeConfig/README.md"},{"type":"ADVISORY","url":"https://github.com/kubesphere/kubesphere"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71208"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kubesphere/kubesphere","events":[{"introduced":"0"},{"last_affected":"887496e7464bfd9bbab71a274340ea9c0b51a060"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"4.0.0"},{"last_affected":"4.1.3-rc.0"}]}}],"versions":["v4.1.3-rc.0","helm-chart-1.1.3","v4.1.2","helm-chart-1.1.2","v4.1.1","v3.4.0","v3.4.0-rc.0","v3.3.0-rc.3","v3.3.0","v3.3.0-rc.2","v3.3.0-rc.1","v3.3.0-rc.0","v3.3.0-alpha.1","v3.3.0-alpha.0","v3.2.0","v3.2.0-rc.1","v3.2.0-alpha.1","v3.2.0-alpha.0","v3.1.0","v3.1.0-alpha.0","v3.0.0","v2.1.0","advanced-2.0.2","advanced-2.0.0","advanced-1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71208.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"}]}