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.
Fix
Public exploits 1
- ronamosa/CVE-2026-18953 PoC on GitHub
Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.
Patch, vendor advisory and mitigation references on NVD 2
- https://aws.amazon.com/security/security-bulletins/2026-075-aws/ Vendor Advisory
- https://github.com/awslabs/mcp/security/advisories/GHSA-66mr-jr63-2jgw Vendor Advisory
Vendor advisories in the News 1
- CVE-2026-18953 - Improper limitation of a pathname in AWS Transform MCP Server AWS Security Bulletins · 2026-10-21
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 6.3 · amazonNVD modified 2026-10-23 21:10
Affected (CPE criteria) 1
cpe:2.3:a:amazon:aws_transform_mcp_server:*:*:*:*:*:python:*:*