CVE-2026-18655

Summary

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.

Affected Software

Weaknesses

• CWE-923: CWE-923: Improper Restriction of Communication Channel to Intended Endpoints

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

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

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