8.6High
CVE-2026-18953Improper limitation of a pathname to a restricted directory in 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.
Weakness (CWE):
CWE-22
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| amazon | aws transform mcp server | 0.1.0 – < 0.1.5 | |
| AWS | aws-transform-mcp-server | 0.1.0 – ≤ 0.1.4 |
References and patches
- https://pypi.org/project/awslabs.aws-transform-mcp-server/0.1.5/ release-notespatchProduct
- https://aws.amazon.com/security/security-bulletins/2026-075-aws/ vendor-advisoryVendor Advisory
- https://github.com/awslabs/mcp/security/advisories/GHSA-66mr-jr63-2jgw release-notesVendor Advisory
CPE matches (NVD) (1)
cpe:2.3:a:amazon:aws_transform_mcp_server:*:*:*:*:*:python:*:*≥ 0.1.0 < 0.1.5