CVE-2026-65806 in Azure CycleCloud
Summary
by MITRE • 08/12/2026
Missing authorization in Azure CycleCloud allows an authorized attacker to disclose information over a network.
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Analysis
by VulDB Data Team • 08/12/2026
This vulnerability represents a critical authorization gap within Microsoft Azure CycleCloud platform that enables authenticated attackers to bypass proper access controls and extract sensitive information through network communications. The flaw stems from insufficient validation of user permissions during information disclosure operations, allowing threat actors who have already established authentication credentials to escalate their privileges and access data they should not be authorized to view. Such vulnerabilities typically arise from improper implementation of access control mechanisms where the system fails to verify that authenticated users possess the necessary permissions for specific resource operations.
The technical nature of this weakness aligns with CWE-285, which addresses insufficient authorization issues in software systems. In Azure CycleCloud's context, this manifests as inadequate checks during network-based information retrieval processes where the platform does not properly enforce role-based access controls or attribute-based access policies. Attackers can exploit this by crafting specific network requests that bypass normal authorization flows, potentially accessing cluster configurations, user credentials, deployment scripts, or other sensitive operational data that should remain restricted to authorized personnel only.
From an operational impact perspective, this vulnerability creates significant risk for organizations using Azure CycleCloud for high-performance computing environments and cluster management. The information disclosure could expose critical infrastructure details including node configurations, resource allocation patterns, security group settings, and potentially even underlying cloud credentials or API keys. These leaked details could enable attackers to conduct more sophisticated attacks such as privilege escalation, lateral movement within the cloud environment, or targeted exploitation of other system components. The network-based nature of the vulnerability means that attackers can leverage existing authenticated sessions to gather intelligence without requiring additional authentication mechanisms.
Organizations should implement immediate mitigations including thorough review and reinforcement of access control policies within their Azure CycleCloud deployments. This involves ensuring proper role assignments, implementing least-privilege principles, and conducting regular authorization audits to identify potential gaps in the permission model. Network-level protections such as firewall rules, intrusion detection systems, and monitoring solutions should be enhanced to detect anomalous information disclosure patterns. Additionally, organizations must consider implementing multi-factor authentication for administrative access and establish comprehensive logging and alerting mechanisms around sensitive operations. The vulnerability also highlights the importance of following security best practices outlined in the MITRE ATT&CK framework under the privilege escalation and credential access domains where unauthorized information disclosure can serve as a foundational step for more advanced compromise techniques.