Improper Directory Limitation in Amazon awslabs.aws-transform-mcp-server Tool
CVE-2026-18953

6.3MEDIUM

Key Information:

Vendor: Aws
Status: Aws-transform-mcp-server
Vendor: CVE Published:; 5 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-18953?

The awslabs.aws-transform-mcp-server tool from Amazon contains a vulnerability due to improper validation of the savePath parameter, which could allow an attacker to write files outside the designated working directory. This issue affects versions 0.1.0 through 0.1.4. Users are encouraged to upgrade to version 0.1.5 or later to address this security risk effectively.

Affected Version(s)

aws-transform-mcp-server 0.1.0 <= 0.1.4

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-18953
Created by ronamosa