What is CVE-2026-71208?

CVE-2026-71208 is a medium-severity vulnerability in Kubesphere, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2026-08-05.

How severe is CVE-2026-71208?

Medium severity. CVSS v3 base score is 6.5 out of 10.

SSRF in Kubesphere

CVE-2026-71208

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).

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.002 (11.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Kubesphere — versions 4.0.0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (third-party-advisory)
309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (third-party-advisory)

Frequently asked questions

What is CVE-2026-71208?: CVE-2026-71208 is a medium-severity vulnerability in Kubesphere, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2026-08-05.
How severe is CVE-2026-71208?: Medium severity. CVSS v3 base score is 6.5 out of 10.