Executive Summary
In May and June 2026, security researcher Justin O'Leary identified 'confused deputy' vulnerabilities in Microsoft Azure and Google Cloud Platform (GCP). These flaws allowed attackers to escalate privileges and bypass access controls. In Azure, the issue involved the Kubernetes Service backup feature, enabling escalation from Backup Contributor to cluster-admin. In GCP, the Config Connector add-on permitted unauthorized users to gain Organization Owner status. Despite disclosures, Microsoft silently patched the flaw, while Google did not acknowledge it as a vulnerability. These incidents underscore the persistent risks in cloud identity management and the need for robust security practices.
Why This Matters Now
The persistence of 'confused deputy' vulnerabilities in major cloud platforms highlights ongoing challenges in securing cloud infrastructures. Organizations must remain vigilant, as such flaws can lead to unauthorized access and data breaches, emphasizing the importance of continuous security assessments and adherence to best practices in identity and access management.
Attack Path Analysis
An attacker exploited a 'confused deputy' vulnerability in Azure Kubernetes Service (AKS) backup service to escalate privileges from Backup Contributor to cluster-admin, enabling lateral movement within the AKS environment. The attacker established command and control by deploying malicious workloads, exfiltrated sensitive data from backups, and caused significant impact by compromising the integrity of the cloud infrastructure.
Kill Chain Progression
Initial Compromise
Description
The attacker exploited a 'confused deputy' vulnerability in the Azure Kubernetes Service (AKS) backup service, allowing unauthorized access to the backup vault.
MITRE ATT&CK® Techniques
Valid Accounts
Use Alternate Authentication Material: Application Access Token
Valid Accounts: Cloud Accounts
Account Manipulation
Modify Authentication Process: Domain Controller Authentication
Account Access Removal
Potential Compliance Exposure
Mapping incident impact across multiple compliance frameworks.
PCI DSS 4.0 – Limit access to system components and cardholder data to only those individuals whose job requires such access.
Control ID: 7.1
NYDFS 23 NYCRR 500 – Cybersecurity Policy
Control ID: 500.03
DORA – ICT Risk Management Framework
Control ID: Article 5
CISA ZTMM 2.0 – Implement robust identity and access management controls.
Control ID: Identity and Access Management
NIS2 Directive – Cybersecurity Risk Management Measures
Control ID: Article 21
Sector Implications
Industry-specific impact of the vulnerabilities, including operational, regulatory, and cloud security risks.
Computer Software/Engineering
Confused deputy flaws in Azure Kubernetes and GCP Config Connector enable privilege escalation, bypassing cloud access controls critical for software development infrastructure.
Information Technology/IT
Cloud misconfiguration vulnerabilities allow attackers to achieve cluster-admin privileges and organization owner access, compromising managed identity trust chains in enterprise environments.
Financial Services
Zero trust segmentation failures and east-west traffic exposure enable lateral movement and data exfiltration from cloud backups containing sensitive financial data.
Government Administration
Config Connector deployment in FedRAMP environments allows invisible privilege escalation to GCP Organization Owner, bypassing government cloud security audit controls.
Sources
- 'Confused Deputy' Flaws Persist in Google Cloud, Microsoft Azurehttps://www.darkreading.com/cloud-security/confused-deputy-flaws-google-cloud-microsoft-azureVerified
- Your AI Agent Is an Easily Confused Deputy: Why Cloud Security Needs a Credential Brokerhttps://www.sans.org/blog/your-ai-agent-easily-confused-deputy-why-cloud-security-needs-credential-brokerVerified
- Defeat the 'Confused Deputy' on Cloud Runhttps://discuss.google.dev/t/defeat-the-confused-deputy-on-cloud-run/328328Verified
Frequently Asked Questions
Cloud Native Security Fabric Mitigations and ControlsCNSF
Aviatrix Zero Trust CNSF is pertinent to this incident as it would likely limit the attacker's ability to escalate privileges, move laterally, and exfiltrate data within the AKS environment.
Control: Cloud Native Security Fabric (CNSF)
Mitigation: The attacker's unauthorized access to the backup vault would likely be constrained, reducing the potential for initial compromise.
Control: Zero Trust Segmentation
Mitigation: The attacker's ability to escalate privileges within the AKS environment would likely be limited, reducing the scope of potential damage.
Control: East-West Traffic Security
Mitigation: The attacker's lateral movement within the AKS environment would likely be restricted, limiting access to other resources and services.
Control: Multicloud Visibility & Control
Mitigation: The attacker's ability to establish command and control within the AKS clusters would likely be constrained, reducing the effectiveness of malicious deployments.
Control: Egress Security & Policy Enforcement
Mitigation: The attacker's data exfiltration efforts would likely be restricted, reducing the volume of sensitive data leaving the environment.
The overall impact on cloud infrastructure integrity would likely be reduced, limiting potential data loss and service disruption.
Impact at a Glance
Affected Business Functions
- Cloud Infrastructure Management
- Data Backup and Recovery
- Identity and Access Management
Estimated downtime: N/A
Estimated loss: N/A
Potential exposure of sensitive data stored in cloud backups and unauthorized deployment of workloads.
Recommended Actions
Key Takeaways & Next Steps
- • Implement Zero Trust Segmentation to enforce least privilege access and prevent unauthorized lateral movement.
- • Deploy East-West Traffic Security controls to monitor and restrict internal traffic flows, mitigating lateral movement risks.
- • Utilize Multicloud Visibility & Control solutions to detect and respond to anomalous activities across cloud environments.
- • Apply Egress Security & Policy Enforcement to control outbound traffic and prevent data exfiltration.
- • Regularly review and update IAM policies to ensure proper access controls and minimize privilege escalation opportunities.
