CVE-2026-71208Medium· 6.5▾ Sunlit

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-specif…

▾ Sunlit zone — Low / medium · no exploitation signal

Depth score36/ 100 · Low

impact 35.8 · likelihood 0 · exploitation 0

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Proof of concept

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Published

Aug 5, 2026

Updated

Aug 10, 2026

CVSS

6.5

Vendor

—

Product

—

CWE

CWE-918

Depth score

36 · Low

EPSS

0.21% · p11

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS history

Exploit-prediction probability, daily snapshots since Aug 10.

0.2% → 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 5 days

Aug 5, 2026Published
Disclosed via NVD
Aug 10, 2026Record revised
Last analysed / modified upstream
Aug 10, 2026EPSS first tracked
0.2%

CWE-918 #nvd

Full technical detail▾

Overview

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).

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd

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