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CVE-2026-116635 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: AMZNCVSS-B:6.1 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://aws.amazon.com/security/security-bulletins/2026-164-aws/	AMZN
https://github.com/awslabs/mcp/security/advisories/GHSA-r6mm-377j-qg8m	AMZN
https://pypi.org/project/awslabs.aws-serverless-mcp-server/0.2.1/	AMZN

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-23	Relative Path Traversal	AMZN
CWE-36	Absolute Path Traversal	AMZN

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Nov 6, 2026	CVE Modified	CISA-ADP
Nov 2, 2026	New CVE Received	AMZN