CVE-2026-2008
Remote Code Injection in abhiphile fermat-mcp eqn_chart Function
Publication date: 2026-02-06
Last updated on: 2026-04-29
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| abhiphile | fermat | to 2025-10-08 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-74 | The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. |
| CWE-94 | The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
[{'type': 'paragraph', 'content': 'CVE-2026-2008 is a code injection vulnerability in the fermat-mcp project, specifically in the eqn_chart function of the file fmcp/mpl_mcp/core/eqn_chart.py.'}, {'type': 'paragraph', 'content': "The vulnerability occurs because the eqn_chart tool uses Python's eval function to process the 'equations' parameter. Although eval is called with a restricted execution scope, attackers can bypass these restrictions to execute arbitrary code."}, {'type': 'paragraph', 'content': 'This means that by manipulating the input to the equations argument, an attacker can inject and run malicious code remotely on the server running fermat-mcp.'}] [2, 3, 4]
How can this vulnerability impact me? :
[{'type': 'paragraph', 'content': 'This vulnerability allows an attacker to execute arbitrary code remotely on the fermat-mcp server, which can lead to serious security consequences.'}, {'type': 'list_item', 'content': "If the MCP service is running locally without sandboxing, arbitrary commands can be executed with the current user's privileges."}, {'type': 'list_item', 'content': 'If strong sandboxing is in place locally, command execution is confined but still possible.'}, {'type': 'list_item', 'content': 'In remote single-tenant or private deployments, remote code execution can compromise the server depending on host isolation.'}, {'type': 'list_item', 'content': 'In multi-tenant or SaaS deployments, this can lead to critical cross-tenant compromise and potentially a full service breach.'}, {'type': 'paragraph', 'content': 'Overall, the vulnerability affects confidentiality, integrity, and availability of the system, making it a significant security risk.'}] [2, 4]
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
[{'type': 'paragraph', 'content': "This vulnerability involves code injection via the eqn_chart tool's equations parameter, which uses Python's eval function insecurely. Detection can focus on monitoring or inspecting requests or inputs to the eqn_chart functionality for suspicious payloads that attempt to execute arbitrary code."}, {'type': 'paragraph', 'content': "Since the vulnerability is exploited by sending crafted equations that get evaluated, detection commands could include searching logs or network traffic for suspicious payload patterns such as usage of Python's __import__ function or system command calls embedded in the equations parameter."}, {'type': 'list_item', 'content': 'Use network packet capture tools (e.g., tcpdump, Wireshark) to filter traffic to the fermat-mcp server and look for suspicious payloads containing keywords like "__import__", "os.system", or other command execution attempts.'}, {'type': 'list_item', 'content': 'Search application logs for requests to eqn_chart with unusual or unexpected input patterns, for example using grep or similar tools: grep -r "__import__" /path/to/fermat-mcp/logs'}, {'type': 'list_item', 'content': 'If the fermat-mcp server exposes an API or command line interface, test it with safe payloads and then with known exploit payloads (in a controlled environment) to observe if arbitrary code execution occurs.'}, {'type': 'paragraph', 'content': 'No specific detection commands or tools are provided in the available resources, but focusing on monitoring eval usage and suspicious input patterns related to the equations parameter is recommended.'}] [2, 3, 4]
What immediate steps should I take to mitigate this vulnerability?
[{'type': 'paragraph', 'content': 'Immediate mitigation steps include restricting or disabling access to the vulnerable eqn_chart functionality to prevent exploitation, especially from untrusted or remote sources.'}, {'type': 'paragraph', 'content': "Since the vulnerability arises from unsafe use of Python's eval function on user-supplied input, consider the following actions:"}, {'type': 'list_item', 'content': 'Disable or restrict the eqn_chart feature until a secure patch or update is available.'}, {'type': 'list_item', 'content': 'Implement network-level access controls or firewall rules to limit access to the fermat-mcp server to trusted users or networks only.'}, {'type': 'list_item', 'content': 'Run the fermat-mcp service in a strong sandbox or container environment with minimal privileges to limit the impact of any potential code execution.'}, {'type': 'list_item', 'content': 'Monitor for exploitation attempts and unusual activity related to the fermat-mcp server.'}, {'type': 'paragraph', 'content': 'The project maintainers have not yet responded or issued a fix, and no known mitigations or countermeasures have been published. It is suggested to consider replacing the affected software with an alternative product if possible.'}] [4, 2]