CVE-2026-5058: aws-mcp-server Command Injection Remote Code Execution Vulnerability

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-11 · updated 2026-06-17
Weakness: CWE-78

Description

aws-mcp-server 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-27968.

Affected products

aws-mcp-server: 1.3.0

References

https://www.zerodayinitiative.com/advisories/ZDI-26-246/

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