Description
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 script.



AWS fixed this issue service-side. No customer action is required.
Published: 2026-10-23
Score: 5.3 Medium
EPSS: n/a
KEV: No
AI Analysis

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Remediation

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History

Fri, 23 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
Description 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 script. AWS fixed this issue service-side. No customer action is required.
Title Incomplete validation in the run_script Python sandbox in AWS MCP Server
First Time appeared Aws
Aws aws Mcp Server
Weaknesses CWE-184
CPEs cpe:2.3:a:aws:aws_mcp_server:n_a:*:*:*:*:*:*:*
Vendors & Products Aws
Aws aws Mcp Server
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N'}

Subscriptions

Aws Aws Mcp Server
cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2026-10-23T19:04:44.790Z

Reserved: 2026-10-23T17:25:48.577Z

Link: CVE-2026-115845

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-23T19:17:44.643

Modified: 2026-10-23T19:23:01.467

Link: CVE-2026-115845

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T20:30:17Z

Weaknesses