CVE-2026-18953
Received Received - Intake

Path Traversal in AWS Transform MCP Server

Publication date: 2026-08-05

Last updated on: 2026-08-05

Assigner: AMZN

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.

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Meta Information

Published
2026-08-05
Last Modified
2026-08-05
Generated
2026-08-06
AI Q&A
2026-08-05
EPSS Evaluated
N/A
NVD
CVE-2026-18953
EUVD
EUVD-2026-53583

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
amazon aws_transform_mcp_server to 0.1.4 (inc)
amazon aws_transform_mcp_server 0.1.5
amazon aws_transform_mcp_server From 0.1.0 (inc) to 0.1.4 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

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Executive Summary

This vulnerability is an improper pathname restriction flaw in the get_resource tool of Amazon's awslabs.aws-transform-mcp-server versions 0.1.0 to 0.1.4. It allows a context-dependent attacker to write arbitrary files outside the intended directory by manipulating the savePath parameter.

Detection Guidance

This vulnerability can be detected by checking the version of the AWS Transform MCP Server. If the version is between 0.1.0 and 0.1.4, the system is vulnerable. Run the command to check the version: aws-transform-mcp-server --version. If the output shows a version in the affected range, upgrade to version 0.1.5 or later immediately.

Impact Analysis

This flaw could enable an attacker to write malicious files outside the intended directory, potentially leading to local code execution. This could compromise system integrity or allow further attacks depending on the attacker's context.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by allowing unauthorized file writes outside restricted directories. Such arbitrary file writes may lead to unauthorized data access, modification, or exfiltration, which are key concerns under these regulations. The risk of local code execution further exacerbates compliance risks by enabling potential data breaches or system compromises.

Mitigation Strategies

Upgrade the AWS Transform MCP Server to version 0.1.5 or later. No other workarounds are available.

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