Medium 6.5Published Aug 3, 2026

CVE-2026-18655Broker Credential and OAuth Token Disclosure in AWS Labs Amazon MQ MCP Server via Prompt Injection

Updated under an hour ago (Oct 25, 2026, 10:10 PM ET)

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It affects AWS amazon-mq-mcp-server. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for AWS amazon-mq-mcp-server

Exploited in the last 30 days

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.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-923
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: AMZN
NVD analysis: Awaiting Analysis
Record last updated: Aug 3, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

AWS amazon-mq-mcp-server aws:amazon_mq_mcp_server (from the name)	through 2.0.23	CNA record

References

https://pypi.org/project/awslabs.amazon-mq-mcp-server/2.0.24/release-notes, patch
https://aws.amazon.com/security/security-bulletins/2026-070-aws/vendor-advisory
https://github.com/awslabs/mcp/security/advisories/GHSA-xwj6-8x5h-hjp6release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.