CVE-2026-18953

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.

CVSS 4.0

6.3CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H

CVSS 3.1

8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 7% of CVEs (scores of 2026-10-25)

CWE

CWE-22

Published

2026-08-05

Modified

2026-10-23

Record from

the NVD, synced 2026-10-24

Affected

• amazon:aws_transform_mcp_server

References

• https://aws.amazon.com/security/security-bulletins/2026-075-aws/
• https://github.com/awslabs/mcp/security/advisories/GHSA-66mr-jr63-2jgw
• https://pypi.org/project/awslabs.aws-transform-mcp-server/0.1.5/

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