SSRF Vulnerability in Foreman via HTTP Proxy Manipulation

Executive Summary

CVE-2026-13316 is a security vulnerability in the Foreman software where attackers can exploit unvalidated HTTP parameters, specifically the test_url parameters in the http_proxies_controller and http_proxy files.

This flaw allows attackers to perform a Server-Side Request Forgery (SSRF) attack, which means they can trick the server into making unauthorized requests on their behalf.

Through this SSRF attack, attackers can access and steal cloud metadata services in AWS, GCP, or Azure environments via the Foreman component.

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Impact Analysis

This vulnerability can lead to unauthorized access to sensitive cloud metadata services in your AWS, GCP, or Azure environments.

Stealing cloud metadata can potentially allow attackers to gather critical information about your cloud infrastructure, which may be used for further exploitation or unauthorized actions.

Although the vulnerability does not directly impact data integrity or availability, the confidentiality of cloud metadata is compromised, which can have serious security implications.

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Detection Guidance

This vulnerability involves exploitation of unvalidated HTTP parameters in the Foreman component, specifically in http_proxies_controller and http_proxy files, allowing SSRF attacks to access cloud metadata services.

To detect this vulnerability on your system or network, you should monitor HTTP requests to the Foreman service for unusual or suspicious parameters, especially those related to test_url or proxy settings that could be used to trigger SSRF.

While no specific commands are provided in the resources, general detection steps include:

• Review Foreman HTTP logs for requests containing unusual or external URLs in parameters related to http_proxies_controller.
• Use network monitoring tools (e.g., tcpdump, Wireshark) to capture and analyze outbound HTTP requests originating from the Foreman server that target cloud metadata IP addresses (such as 169.254.169.254).
• Run application-level scans or use security testing tools to attempt SSRF exploitation against the Foreman instance to verify if the vulnerability is present.

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Mitigation Strategies

Immediate mitigation steps should focus on preventing exploitation of the SSRF vulnerability in Foreman by restricting or validating HTTP parameters and limiting access to cloud metadata services.

• Apply any available patches or updates provided by Foreman or your vendor that address this specific vulnerability.
• Implement strict input validation on HTTP parameters in the http_proxies_controller and http_proxy files to prevent unvalidated URLs.
• Restrict network access from the Foreman server to cloud metadata IP addresses (e.g., 169.254.169.254) using firewall rules or network policies.
• Monitor logs and network traffic for suspicious activity indicative of SSRF attempts.

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Compliance Impact

This vulnerability allows attackers to perform SSRF attacks to steal cloud metadata services in AWS, GCP, or Azure environments through the Foreman component. Unauthorized access to sensitive cloud metadata could lead to exposure of confidential information, which may impact compliance with data protection regulations such as GDPR and HIPAA that require safeguarding sensitive data.

However, the provided information does not explicitly describe the direct impact on compliance with specific standards or regulations.

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