CVE-2026-18953

HIGH 8.6

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

CVSS Score

8.6

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-22
Vendor	aws
Product	aws-transform-mcp-server
Published	Aug 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

AWS / aws-transform-mcp-server

0.1.0 ≤ 0.1.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

pypi.org: https://pypi.org/project/awslabs.aws-transform-mcp-server/0.1.5/ aws.amazon.com: https://aws.amazon.com/security/security-bulletins/2026-075-aws/