CVE-2026-66379 in Artifactory
Summary
by MITRE • 08/12/2026
An authenticated user may view private Puppet module metadata without repository read access.
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Analysis
by VulDB Data Team • 08/12/2026
This vulnerability represents a privilege escalation issue within Puppet's module management system where authenticated users can access private module metadata even when they lack explicit read permissions for the underlying repository. The flaw exists in the authorization logic that governs metadata exposure, allowing unauthorized information disclosure through crafted requests to the module metadata endpoints. This represents a critical breakdown in the principle of least privilege and could enable attackers to gather intelligence about private infrastructure components.
The technical implementation of this vulnerability stems from improper access control validation during metadata retrieval operations. When users request module information, the system fails to properly verify whether the requesting user possesses adequate permissions to view the specific repository containing the module metadata. This authorization gap typically occurs in systems where metadata endpoints are designed to be accessible to authenticated users but do not perform comprehensive permission checks against the underlying resource hierarchy. The vulnerability is classified under CWE-284 Access Control Bypass and aligns with ATT&CK technique T1078 Valid Accounts, as it exploits legitimate authentication mechanisms to gain unauthorized access to restricted information.
The operational impact of this vulnerability extends beyond simple information disclosure, as it enables reconnaissance activities that could lead to more severe attacks. Attackers can gather detailed information about private module versions, dependencies, and configurations without requiring explicit repository read permissions. This intelligence could be leveraged to identify potential attack vectors through known vulnerabilities in specific module versions or to craft targeted social engineering campaigns. The exposure of private module metadata may also reveal internal infrastructure patterns, deployment strategies, and organizational practices that are typically considered sensitive information.
Mitigation strategies should focus on implementing comprehensive access control checks at all metadata endpoints, ensuring that permission validation occurs before any information is returned to authenticated users. Organizations should enforce strict authorization boundaries between different levels of system access, particularly for metadata operations that may reveal information about private resources. The recommended approach includes implementing proper role-based access controls with fine-grained permissions, conducting regular security audits of access control logic, and ensuring that all metadata retrieval operations validate both authentication status and repository-level read permissions. Additionally, organizations should consider implementing logging and monitoring for unauthorized metadata access attempts to detect potential exploitation attempts.