CVE-2026-70398Network attack vector

Authenticated token exfiltration via attacker-selected secret namespace

Published Aug 12, 2026 · Updated Aug 12, 2026

Confused-deputy behavior in Red Hat Advanced Cluster Management allows remote authenticated users to exfiltrate spoke bearer tokens. The multicloud-integrations GitOpsCluster controller trusts spec.argoServer.argoNamespace and writes managed-cluster secrets into that attacker-selected namespace instead of enforcing the intended destination. Tenant access sufficient to create or alter a GitOpsCluster resource reaches the flaw, exposing tokens that permit cluster access and bypass ArgoCD AppProject policy boundaries.

CVSS severity9.6
Critical
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Confused-deputy behavior in Red Hat Advanced Cluster Management allows remote authenticated users to exfiltrate spoke bearer tokens. The multicloud-integrations GitOpsCluster controller trusts spec.argoServer.argoNamespace and writes managed-cluster secrets into that attacker-selected namespace instead of enforcing the intended destination. Tenant access sufficient to create or alter a GitOpsCluster resource reaches the flaw, exposing tokens that permit cluster access and bypass ArgoCD AppProject policy boundaries.

The record

CVE
CVE-2026-70398
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
389 Directory Server
Product
Red Hat Advanced Cluster Management for Kubernetes
Classifications
CWE-441, T1528
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

389 Directory Server · Red Hat Advanced Cluster Management for KubernetesAffected versions are unavailable in this record.

Published CVSS scores

9.6Red HatCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-441Unintended Proxy or Intermediary ('Confused Deputy')
T1528Steal Application Access Token

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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