Impact Analysis

This vulnerability can lead to unauthorized disclosure of sensitive information stored on the server, compromising confidentiality. Attackers can remotely exploit this flaw to read critical system files or private data, which may facilitate further attacks or system compromise.

Because the exploit is publicly available and easy to execute, systems using affected FastApiAdmin versions are at moderate risk of being targeted.

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Compliance Impact

I don't know

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Executive Summary

CVE-2026-2976 is an information disclosure vulnerability in FastApiAdmin versions up to 2.2.0. It affects the download_controller function in the Download Endpoint component. The vulnerability occurs because the file_path argument is improperly handled, allowing an attacker to manipulate it to access sensitive files on the server remotely without proper authorization.

Specifically, the endpoint accepts arbitrary file_path parameters without sanitization or canonicalization, enabling attackers to use absolute paths or path traversal payloads to read sensitive server files such as /etc/passwd or private keys.

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability can be detected by testing the affected FastApiAdmin download endpoint for improper handling of the file_path parameter. Specifically, attempts to download sensitive files using path traversal payloads or absolute paths can reveal the vulnerability.'}, {'type': 'paragraph', 'content': 'You can try sending HTTP requests to the endpoint `/api/v1/common/file/download` with crafted file_path parameters to check if unauthorized files can be accessed.'}, {'type': 'list_item', 'content': "Use curl or similar tools to request sensitive files, for example: curl -X GET 'http://<target>/api/v1/common/file/download?file_path=/etc/passwd'"}, {'type': 'list_item', 'content': "Test path traversal payloads such as: curl -X GET 'http://<target>/api/v1/common/file/download?file_path=../../../../etc/passwd'"}, {'type': 'paragraph', 'content': 'Successful retrieval of sensitive files like /etc/passwd indicates the presence of the vulnerability.'}] [1, 3]

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Mitigation Strategies

Immediate mitigation steps include restricting access to the vulnerable download endpoint and validating the file_path parameter rigorously.

• Enforce strict path validation and canonicalization to prevent absolute paths and path traversal sequences.
• Restrict downloads to a safe upload directory or map logical IDs to files instead of accepting arbitrary file paths.
• Validate user permissions on a per-file basis to ensure only authorized access.
• Serve files through a controlled, safe API or use signed, short-lived download tokens.

If possible, replace the affected FastApiAdmin component with an alternative product or update to a version that addresses this issue once available.

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