Broker Credential and OAuth Token Disclosure in AWS Labs Amazon MQ MCP Server via Prompt Injection
Published Aug 3, 2026
7.1
HIGHCVSS 4.0
EPSS 0.42%
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
-
- Version 0StatusaffectedConstraints<=2.0.23
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| AWS | Amazon-MQ-Mcp-Server | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
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
1 other source (NVD) ▾
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Aug 3, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
Aug–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.42% (0.00423) | 34.35th | v5 (v2026.06.15) |
| Aug 4, 2026 | 0.25% (0.00252) | 16.70th | v5 (v2026.06.15) |
References (3)
- https://aws.amazon.com/security/security-bulletins/2026-070-aws/ vendor-advisory
- https://github.com/awslabs/mcp/security/advisories/GHSA-xwj6-8x5h-hjp6 release-notes
- https://pypi.org/project/awslabs.amazon-mq-mcp-server/2.0.24/ release-notespatch
| Link | Providers | Tags |
|---|---|---|
| https://aws.amazon.com/security/security-bulletins/2026-070-aws/ | vendor-advisory | |
| https://github.com/awslabs/mcp/security/advisories/GHSA-xwj6-8x5h-hjp6 | release-notes | |
| https://pypi.org/project/awslabs.amazon-mq-mcp-server/2.0.24/ | release-notespatch |
Change history (0)
No recorded changes yet.