TI-2026-49883 Aliases CVE-2026-71208 GHSA-w56j-p32j-vmh4

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

LOW 29CWE-918Published 2026-08-05 · Updated 2026-08-12

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.

Summary

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).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00354 29th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
kubesphere	KubeSphere	4.0.0 – 4.1.3-rc.0	—	No fix listed	CNA

KubeSphere Vendorkubesphere Affected 4.0.0 – 4.1.3-rc.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-71208
2026-10-03 Alias added: GHSA-w56j-p32j-vmh4

References

Advisory 2

TI-2026-62059 KubeSphere through 4.1.3 SSRF via git credential verification endpoint CVSS 4.0HIGH 8.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences