CVE-2026-116635— Improper limitation of a pathname to a restricted directory in the deployment status component of the AWS Serverless MCP Server

Quick assessment

Affected

AWS aws-serverless-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.

在 AWS Serverless MCP 服务器（aws-serverless-mcp-server）的部署状态组件中，v0.2.1 版本之前未对文件路径名施加适当的限制，导致能够影响 MCP 代理的攻击者可能读取部署状态目录之外的 JSON 文件内容；若已启用写入权限，攻击者还可能在该目录之外创建或覆盖 JSON 文件。该漏洞可通过目录遍历序列或在项目名称输入中提供绝对路径来触发。为修复此问题，用户应升级至 v0.2.1 版本。

CVSS 6.1 · Medium Updated Nov 03, 2026

Possible ATT&CK Techniques 3 AI

T1039 · Data from Network Shared Drive T1566 · Phishing T1083 · File and Directory Discovery

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Vulnerability Information

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Vulnerability Title

Improper limitation of a pathname to a restricted directory in the deployment status component of the AWS Serverless MCP Server

Source: CVE Program / CVE List V5

Vulnerability Description

Improper limitation of a pathname to a restricted directory in the deployment status component of the AWS Serverless MCP Server (aws-serverless-mcp-server) before v0.2.1 might allow an actor who can influence the MCP agent to read the contents of JSON files outside the intended deployment status directory. Where write access has been enabled, to create or overwrite JSON files outside that directory. This issue is reachable through directory traversal sequences or an absolute path supplied in the project name input. To remediate this issue, users should upgrade to version v0.2.1.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

相对路径遍历

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
AWS	aws-serverless-mcp-server	0 ~ 0.2.1	-

II. Public POCs for CVE-2026-116635

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-116635

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Other References for CVE-2026-116635 (3)

https://github.com/awslabs/mcp/security/advisories/GHSA-r6mm-377j-qg8m third-party-advisory
https://pypi.org/project/awslabs.aws-serverless-mcp-server/0.2.1/ release-notes patch
https://aws.amazon.com/security/security-bulletins/2026-164-aws/ vendor-advisory

https://www.cve.org/CVERecord?id=CVE-2026-116635

Same Patch Batch · AWS · 2026-11-02 · 4 CVEs total

CVE-2026-119085	8.8 HIGH	Template injection in the publishing component of awslabs Virtual Engineering Workbench
CVE-2026-119301	7.9 HIGH	Improper neutralization of quoting syntax in Apache Iceberg SQL identifier generation in A
CVE-2026-120497	5.0 MEDIUM	Stored cross-site scripting in the HTML report generator of aidlc-traceability in AWS AI-D

IV. Related Vulnerabilities

Same vendor: AWS

Same weakness: CWE-23