Vulnerabilities CVE-2026-71208

CVE-2026-71208

Medium

Open

TLP:CLEAR

KubeSphere - SSRF via Unvalidated Cluster CRD Connection Endpoint in Cluster Reconciliation

NVD CVE.org

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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).

Details

CVSS Score: 6.5
EPSS Score ⓘ: 0.21%

11.2th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Confidence: 90%
Published: Aug 5, 2026
Last Modified: Aug 12, 2026

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