aws-mcp-server AWS CLI Command Injection Remote Code Execution Vulnerability.
Date: 2026-04
Attack vector: command-injection
Category: vulnerability-disclosure
Severity: Critical
CVE: CVE-2026-5059
CWE: CWE-78
CVSS: 9.8 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

aws-mcp-server AWS CLI Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of aws-mcp-server. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the allowed commands list. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the MCP server. Was ZDI-CAN-27969.


Mitigations:

Architectural layers (MAESTRO):