Paper/Archive/CVE-2026-5059

CVE-2026-5059

aws-mcp-server aws-mcp-server — aws-mcp-server AWS CLI Command Injection Remote Code Execution Vulnerability

CVSS 9.8 (CNA)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 79.8.798 × 2016.0 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

aws-mcp-server1.3.0–CNA

Scores by source

zdi (CNA)9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refzerodayinitiative.com/advisories/ZDI-26-245