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CVE-2026-18953— Improper limitation of a pathname to a restricted directory in aws-transform-mcp-server

Quick assessment

Affected
AWS aws-transform-mcp-server
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Amazon Open source MCP servers for AWS是美国Amazon公司的一款亚马逊云服务连接的模块集合。 Amazon Open source MCP servers for AWS 0.1.0版本至0.1.4版本存在路径遍历漏洞，该漏洞源于对get_resource工具中savePath参数的路径限制不当，可能允许依赖上下文的攻击者在预期工作目录之外写入任意文件。

CVSS 8.6 · High EPSS 0.18% · P7

Affected Version Matrix 1

VendorProduct Version RangeStatus
AWS aws-transform-mcp-server 0.1.0≤ 0.1.4 affected
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I. Basic Information for CVE-2026-18953

Vulnerability Information
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Vulnerability Title
Improper limitation of a pathname to a restricted directory in aws-transform-mcp-server
Source: CVE Program / CVE List V5
Vulnerability Description
Improper limitation of a pathname to a restricted directory in the get_resource tool in Amazon awslabs.aws-transform-mcp-server 0.1.0 through 0.1.4 might allow a context-dependent actor to write arbitrary files outside the intended working directory via the savePath parameter. To remediate this issue, users should upgrade to version 0.1.5 or later.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Amazon Open source MCP servers for AWS 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Amazon Open source MCP servers for AWS是美国Amazon公司的一款亚马逊云服务连接的模块集合。 Amazon Open source MCP servers for AWS 0.1.0版本至0.1.4版本存在路径遍历漏洞，该漏洞源于对get_resource工具中savePath参数的路径限制不当，可能允许依赖上下文的攻击者在预期工作目录之外写入任意文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
AWS aws-transform-mcp-server 0.1.0 ~ 0.1.4 -

II. Public POCs for CVE-2026-18953

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10231 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-18953

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Vendor Advisories for CVE-2026-18953 (2)

IV. Related Vulnerabilities

Same vendor: AWS
Same weakness: CWE-22

V. Comments for CVE-2026-18953

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