Is CVE-2026-18655 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-18655?

CVE-2026-18655 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-18655

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.