{"id":"CVE-2026-115845","title":"Incomplete validation in the run_script Python sandbox in AWS MCP Server","summary":"An incomplete list of disallowed inputs in the Python code validator of the run_script tool in AWS MCP Server might allow an authenticated remote user to execute arbitrary code within their own isolated session environment via a crafted …","severity":"medium","cvss":6.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","cvssSource":"cna","cwe":["CWE-184"],"vendor":"AWS","product":"AWS MCP Server","affected":["mcp_server N/A"],"published":"2026-10-23","updated":"2026-10-23","sourceUpdated":"2026-10-23T19:04:44.790Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115845","references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-149-aws/"}],"tags":["cve.org"],"ingestedAt":"2026-10-23T19:35:13.444Z","slug":"CVE-2026-115845","body":"## Overview\n\nAn incomplete list of disallowed inputs in the Python code validator of the run_script tool in AWS MCP Server might allow an authenticated remote user to execute arbitrary code within their own isolated session environment via a crafted script.\n\n\n\nAWS fixed this issue service-side. No customer action is required.\n\n## Affected\n\n- `mcp_server N/A`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":35,"depthScoreParts":{"impact":35.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}