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OpenAdvisories
High · 8.6 Public exploit CVE-2026-18953 EUVD-2026-53583

Improper limitation of a pathname to a restricted directory in aws-transform-mcp-server

Published Aug 5, 2026 · Updated Aug 6, 2026 · Assigned by AMZN

Vendor: AWS Product: aws-transform-mcp-server

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.

Affected products

VendorProductAffectedFixed
AWS aws-transform-mcp-server 0.1.0 – ≤ 0.1.4 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

  • ronamosa/CVE-2026-18953 ★ 0 · Aug 8, 2026

    PoC for CVE-2026-18953 — arbitrary file write (CWE-22) in awslabs.aws-transform-mcp-server's get_resource tool via the savePath parameter

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

References