(0Day) aws-mcp-server AWS CLI Command Injection Remote Code Execution Vulnerability
Vulnerability Details
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.
Additional Details
09/03/25 – ZDI submitted the report to the vendor
10/27/25 – ZDI asked to confirm the receipt of the report
11/06/25 – ZDI asked for updates
12/14/25 – ZDI notified the vendor of the intention to publish the case as a 0-day advisory
12/15/25 – The vendor rejected the vulnerability
02/20/26 – ZDI provided more information
03/09/26 – ZDI notified the vendor of the intention to publish the case as a 0-day advisory
-- Mitigation: Given the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the product
Disclosure Timeline
- 2025-09-03 - Vulnerability reported to vendor
- 2026-04-21 - Coordinated public release of advisory
- 2026-04-21 - Advisory Updated
Credit
Alfredo Oliveira and David Fiser of Trend Research
