CVE-2026-71208Network attack vectorHinoki check available

Authenticated SSRF via unvalidated Cluster CRD endpoint

Published Aug 5, 2026 · Updated Aug 5, 2026

SSRF in KubeSphere 4.0.0 through 4.1.3-rc.0 allows remote authenticated users to make internal requests through Cluster CRDs. Cluster reconciliation parses KubernetesAPIEndpoint only for URL syntax, then calls Discovery().ServerVersion() without blocking internal destinations. Creating or updating a Cluster CRD is required, and requests originate from controller-manager and apiserver pods with access to internal or metadata services.

CVSS severity6.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

SSRF in KubeSphere 4.0.0 through 4.1.3-rc.0 allows remote authenticated users to make internal requests through Cluster CRDs. Cluster reconciliation parses KubernetesAPIEndpoint only for URL syntax, then calls Discovery().ServerVersion() without blocking internal destinations. Creating or updating a Cluster CRD is required, and requests originate from controller-manager and apiserver pods with access to internal or metadata services.

The record

CVE
CVE-2026-71208
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
KubeSphere
Product
KubeSphere
Classifications
CWE-918
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0.0 <=4.1.3-rc.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

KubeSphere · KubeSphereversion=4.0.0 <=4.1.3-rc.0

Published CVSS scores

6.5TuranSecCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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