# CVE-2026-18655

## Summary

- **CVE ID:** CVE-2026-18655
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-923
- **Published:** Aug 3, 2026
- **Last Modified:** Aug 3, 2026

## Description

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 Products

- AWS — amazon-mq-mcp-server (0)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.25%
- **EPSS Percentile:** 16.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._