Vulnerability DatabaseCVE-2026-18655
Mend.io Vulnerability Database
The largest open source vulnerability database
What is a Vulnerability ID?
New vulnerability? Tell us about it!
CVE-2026-18655
Published:August 03, 2026
Updated:August 06, 2026
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 Packages
awslabs.amazon-mq-mcp-server (PYTHON):
Affected version(s) >=1.0.1 <2.0.24
Fix Suggestion:
Update to version 2.0.24
Related Resources (3)
https://github.com/awslabs/mcp/security/advisories/GHSA-xwj6-8x5h-hjp6
https://pypi.org/project/awslabs.amazon-mq-mcp-server/2.0.24/
https://aws.amazon.com/security/security-bulletins/2026-070-aws/
Do you need more information?
Contact Us
CVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Improper Restriction of Communication Channel to Intended Endpoints
CWE-923
EPSS
Base Score:
0.25