CVE-2026-18655

Improper restriction of intended endpoints in the RabbitMQ broker connection tools of the Amazon MQ MCP Server (awslabs.amazon-mq-mcp-server) before 2.0.24 may allow a remote unauthenticated actor (via prompt injection) to obtain Amazon MQ for RabbitMQ broker credentials or OAuth access tokens sent to a crafted endpoint controlled through a broker hostname introduced in the MCP client context. To remediate this issue, users should upgrade to version 2.0.24.

Score

CVSS 4.0 7.1 High

Status

Awaiting Analysis - ff89ba41-3aa1-4d27-914a-91399e9639e5

Published

2026-08-03

Last modified

2026-10-23

Weaknesses

CWE-923

Affected products

• Amazon-mq-mcp-server (Aws)

References

• https://pypi.org/project/awslabs.amazon-mq-mcp-server/2.0.24/
• https://aws.amazon.com/security/security-bulletins/2026-070-aws/
• https://github.com/awslabs/mcp/security/advisories/GHSA-xwj6-8x5h-hjp6