CVE-2026-71208CWE-918ssrf

CVE-2026-71208

Medium · published August 5, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
27.8
In the wild
Unconfirmed
What it is

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).

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00354 · 27.8th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-08-05T12:16Z
References (2)
https://github.com/ashikmd7/kubeSphere/blob/main/SSRF%20via%20Cluster%20CRD%20KubeConfig/README.md · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2chttps://github.com/kubesphere/kubesphere · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
EPSS history
Timeline
  • 05 AUG 06:59Z
    KubeSphere - SSRF via Unvalidated Cluster CRD Connection Endpoint in Cluster Reconciliation
    cvelistv5