{"id":"CVE-2026-71208","state":"PUBLISHED","title":"KubeSphere - SSRF via Unvalidated Cluster CRD Connection Endpoint in Cluster Reconciliation","description":"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).","publishedAt":"2026-08-05T06:59:13.308Z","updatedAt":"2026-08-12T07:44:02.257Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","source":"TuranSec"},"assigner":"TuranSec","products":["kubesphere KubeSphere"],"affected":[{"vendor":"kubesphere","product":"KubeSphere","defaultStatus":"unknown","versions":[{"version":"4.0.0","status":"affected","lessThanOrEqual":"4.1.3-rc.0","versionType":"custom"}],"programFiles":["pkg/utils/clusterclient/clusterclient.go"]}],"references":["https://github.com/ashikmd7/kubeSphere/blob/main/SSRF%20via%20Cluster%20CRD%20KubeConfig/README.md","https://github.com/kubesphere/kubesphere"],"weaknesses":["CWE-918"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/71xxx/CVE-2026-71208.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-71208","state":"PUBLISHED","datePublished":"2026-08-05T06:59:13.308Z","dateUpdated":"2026-08-12T07:44:02.257Z","assignerShortName":"TuranSec","assignerOrgId":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c","dateReserved":"2026-08-05T06:56:15.799Z"},"containers":{"cna":{"title":"KubeSphere - SSRF via Unvalidated Cluster CRD Connection Endpoint in Cluster Reconciliation","descriptions":[{"lang":"en","value":"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)."}],"affected":[{"vendor":"kubesphere","product":"KubeSphere","defaultStatus":"unknown","versions":[{"version":"4.0.0","status":"affected","lessThanOrEqual":"4.1.3-rc.0","versionType":"custom"}],"programFiles":["pkg/utils/clusterclient/clusterclient.go"]}],"references":[{"url":"https://github.com/ashikmd7/kubeSphere/blob/main/SSRF%20via%20Cluster%20CRD%20KubeConfig/README.md","tags":["third-party-advisory"]},{"url":"https://github.com/kubesphere/kubesphere","tags":["third-party-advisory"]}],"metrics":[{"other":{"type":"CVSS_3.1_severity","content":{"value":"HIGH"}},"scenarios":[{"lang":"en","value":"GENERAL"}]},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseSeverity":"MEDIUM","baseScore":6.5,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918 Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"TuranSec","orgId":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c","dateUpdated":"2026-08-12T07:44:02.257Z"},"datePublic":"2026-08-05T06:59:00.000Z","credits":[{"lang":"en","value":"Ashik Mohamed (ashikmd7)","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.4"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-05T13:20:09.859595Z","id":"CVE-2026-71208","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-05T13:20:20.965Z"}}]}}}