CVE-2026-15749 in mastergo-magic-mcp
Summary
by MITRE • 07/15/2026
A security flaw has been discovered in mastergo-design mastergo-magic-mcp up to 0.2.0. This issue affects the function execute of the file src/tools/get-c2d.ts of the component mcp__C2d. Performing a manipulation of the argument filePath results in path traversal. The attack requires a local approach. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
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Analysis
by VulDB Data Team • 07/15/2026
This vulnerability represents a critical path traversal flaw in the mastergo-design mastergo-magic-mcp component version 0.2.0 and earlier, specifically within the execute function of src/tools/get-c2d.ts file. The weakness allows attackers to manipulate the filePath argument to access arbitrary files on the system through directory traversal techniques. This type of vulnerability falls under CWE-23 Path Traversal and is classified as a local privilege escalation vector due to its requirement for local system access. The component mcp__C2d's C2d functionality becomes compromised when processing user-supplied file paths without proper validation or sanitization mechanisms.
The technical exploitation occurs through manipulation of the filePath parameter where an attacker can craft malicious input sequences such as ../ or ..\ that traverse directories beyond the intended scope. This allows access to sensitive files, system resources, or potentially execute arbitrary code within the application's context. The vulnerability represents a direct violation of secure coding practices and demonstrates inadequate input validation controls. According to ATT&CK framework, this maps to T1059 Command and Scripting Interpreter and T1566 Impersonation, as it enables unauthorized file access and potential privilege escalation. The attack vector is classified as local since it requires physical or system-level access to the target machine, making it less accessible but still dangerous in environments where local access is possible.
The operational impact of this vulnerability extends beyond simple data exposure to potentially enable full system compromise when combined with other attack vectors. An attacker with local access could leverage this flaw to read configuration files, access sensitive credentials, or even escalate privileges to gain administrative control over the affected system. The fact that a public exploit exists significantly increases the risk profile as it reduces the barrier to successful exploitation. Organizations running this component version are particularly vulnerable since they may be unaware of the specific flaw in their environment. The delayed response from the project maintainers following early issue reporting creates additional risk as users continue to operate with known vulnerable code, potentially leading to widespread compromise across affected deployments.
Mitigation strategies should prioritize immediate patching or upgrading to versions that address this path traversal vulnerability. System administrators should implement input validation and sanitization measures to prevent malicious path manipulation attempts, including proper file path normalization and access control enforcement. The principle of least privilege must be enforced by limiting the application's ability to traverse directories beyond designated areas. Security monitoring should include detection of suspicious file access patterns and directory traversal attempts. Organizations should also consider implementing web application firewalls or intrusion detection systems that can identify and block malicious path traversal attempts. Regular security audits and code reviews focusing on input validation controls are essential to prevent similar vulnerabilities in future development cycles, aligning with NIST SP 800-53 security controls for input validation and access control mechanisms.