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CVE-2026-115845— Incomplete validation in the run_script Python sandbox in AWS MCP Server

Quick assessment

Affected
AWS AWS MCP Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

AWS MCP Server 中 工具的 Python 代码验证器对禁止输入项的列表不完整，可能导致经过身份验证的远程用户通过构造恶意脚本，在其自身隔离的会话环境中执行任意代码。 AWS 已在服务端修复此问题，客户无需采取任何操作。

CVSS 6.4 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
AWS AWS MCP Server N/A affected
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I. Basic Information for CVE-2026-115845

Vulnerability Information
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Vulnerability Title
Incomplete validation in the run_script Python sandbox in AWS MCP Server
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不完整的黑名单
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
AWS AWS MCP Server N/A -

II. Public POCs for CVE-2026-115845

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III. Intelligence Information for CVE-2026-115845

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Vendor Advisories for CVE-2026-115845 (1)

Same Patch Batch · AWS · 2026-10-23 · 3 CVEs total

CVE-2026-115812 9.8 CRITICAL Relative path traversal during model archive extraction in Amazon Web Services Multi Model
CVE-2026-115813 5.8 MEDIUM Server-side request forgery in the model download path in Amazon Web Services Multi Model

IV. Related Vulnerabilities

Same vendor: AWS
Same weakness: CWE-184

V. Comments for CVE-2026-115845

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