KubeSphere - SSRF via Unvalidated Cluster CRD Connection Endpoint in Cluster Reconciliation (CVE-2026-71208) | HOL Guard CVE

Medium · CVSS 6.5CVE-2026-71208

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

Answer in brief

CVE-2026-71208 records a Medium severity (CVSS 6.5) vulnerability in KubeSphere - SSRF via Unvalidated Cluster CRD Connection Endpoint in Cluster Reconciliation. The current sources do not mark it as known exploited. The current feed maps kubesphere/KubeSphere (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 5, 2026Updated Aug 26, 2026Source checked Sep 19, 2026First seen by HOL Aug 5, 2026Material review Aug 26, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps kubesphere/KubeSphere (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
kubesphere/KubeSpheregeneric	4.0.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for kubesphere/KubeSphere.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 5, 2026

Sources and claim methodology

Upstream source 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).

Quoted source text, attributed separately from HOL analysis.