CVE-2026-96659 in Satellite
Summary
by MITRE • 10/01/2026
A flaw was found in Foreman. This vulnerability allows an authenticated user with low-level Viewer permissions to cause unauthorized information disclosure by submitting requests to template preview endpoints. By exploiting this issue, the user can access sensitive data, such as host root passwords. Furthermore, under insecure system configurations where Safemode protections are disabled, the flaw may allow the user to execute arbitrary commands as the Foreman system account.
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Analysis
by VulDB Data Team • 10/01/2026
The vulnerability identified in Foreman represents a critical security failure within the infrastructure automation platform's template preview functionality. This issue specifically targets authenticated users who possess low-level Viewer permissions, which should theoretically be restricted from performing sensitive operations or accessing confidential data. The core of the flaw lies in how the application processes requests sent to its template preview endpoints. These endpoints are designed to render templates for verification purposes before deployment, but they fail to adequately enforce access controls during this rendering process. Consequently, an attacker with minimal privileges can manipulate these endpoints to trigger unintended side effects that bypass standard permission boundaries. This misconfiguration or logic error allows the user to extract information that is strictly reserved for administrators or higher-privileged roles, fundamentally undermining the principle of least privilege that underpins secure system design.
The operational impact of this vulnerability is severe due to the nature of the data exposed and the potential for further exploitation. By exploiting the flaw in the template preview mechanism, an authenticated user can access sensitive configuration details stored within Foreman databases or associated systems. Most critically, this includes host root passwords and other authentication credentials that are essential for managing infrastructure nodes. The disclosure of these secrets compromises the integrity and confidentiality of the entire managed environment, as attackers gain the ability to authenticate directly to target hosts with full administrative rights. This level of access allows for lateral movement within the network, data exfiltration, and potential disruption of services. In environments where Foreman is integrated with other tools like Puppet or Ansible, this compromise can extend beyond simple credential theft to include broader system control through automated configuration management channels.
Furthermore, the severity escalates significantly in systems that have disabled Safemode protections within their ERB template engine configurations. Safemode is a security feature designed to restrict the methods and attributes available during template rendering to prevent arbitrary code execution. When this protection is disabled, which may occur due to legacy compatibility requirements or misconfiguration by administrators, the vulnerability transforms from an information disclosure issue into a remote code execution vector. An attacker can craft specific malicious templates that leverage unrestricted Ruby method calls within the preview endpoint context. Since these templates are rendered in the context of the Foreman system account, successful exploitation results in arbitrary command execution with the privileges of that service account. This effectively grants full control over the server hosting Foreman, allowing attackers to install backdoors, pivot to other internal systems, or exfiltrate data at will without detection by standard permission-based security controls.
From a classification perspective, this vulnerability aligns with CWE-200, which covers Information Exposure, as it allows unauthorized access to sensitive system information. Additionally, the potential for remote code execution when Safemode is disabled maps directly to CWE-94, specifically describing Improper Control of Generation of Code (Code Injection). In terms of attack tactics, this flaw facilitates initial compromise and privilege escalation within the ATT&CK framework, particularly relating to techniques involving exploitation of application software vulnerabilities. The ability to execute commands as a system account also relates to lateral movement and persistence strategies where an attacker establishes a foothold on critical infrastructure components.
Mitigation for this vulnerability requires immediate action by Foreman administrators. The primary recommendation is to ensure that the Safemode protection feature remains enabled in all production environments, as it provides a crucial defense-in-depth layer against template injection attacks. Administrators should audit their configuration files to verify that no legacy settings have inadvertently disabled these security controls. Additionally, organizations must review and tighten user permissions within Foreman, ensuring that Viewer roles do not retain access to sensitive endpoints unless absolutely necessary for specific operational needs. Regular updates to the Foreman software are essential, as patches addressing this logic flaw in template rendering should be applied promptly. Security teams should also implement monitoring solutions capable of detecting anomalous requests to preview endpoints and unusual privilege escalations within the application logs to identify potential exploitation attempts in real time.