5.5Media
CVE-2026-4270AWS API MCP File Access Restriction Bypass
Descripción
Improper Protection of Alternate Path exists in the no-access and workdir feature of the AWS API MCP Server versions >= 0.2.14 and < 1.3.9 on all platforms may allow the bypass of intended file access restriction and expose arbitrary local file contents in the MCP client application context. To remediate this issue, users should upgrade to version 1.3.9.
Debilidad (CWE):
CWE-424
Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.
Productos y versiones afectados
| Fabricante | Producto | Versiones | |
|---|---|---|---|
| amazon | aws api mcp server | 0.2.14 – < 1.3.9 | |
| AWS | AWS API MCP Server | 0.2.14 – < 1.3.9 |
Referencias y parches
- https://aws.amazon.com/security/security-bulletins/2026-007-AWS/ vendor-advisoryVendor Advisory
- https://pypi.org/project/awslabs.aws-api-mcp-server/1.3.9/ patchThird Party Advisory
Coincidencias CPE (NVD) (1)
cpe:2.3:a:amazon:aws_api_mcp_server:*:*:*:*:*:python:*:*≥ 0.2.14 < 1.3.9