Vulnerability Description
Improper handling of an initialization failure in AWS API MCP Server from 0.2.13 through 1.3.46 might allow an actor to bypass the user-configured security policy and execute AWS API operations that the policy was set to deny or gate. When initialization of the security policy enforcement data fails at server startup, the policy check is skipped for the lifetime of the process. IAM permissions on the configured credentials remain in effect and are unaffected. To remediate this issue, users should upgrade to version 1.3.47.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://aws.amazon.com/security/security-bulletins/2026-063-aws/
- https://github.com/awslabs/mcp/security/advisories/GHSA-29w2-fq35-v728
- https://pypi.org/project/awslabs.aws-api-mcp-server/1.3.47/
FAQ
What is CVE-2026-16584?
CVE-2026-16584 is a vulnerability with a CVSS score of 7.0 (HIGH). Improper handling of an initialization failure in AWS API MCP Server from 0.2.13 through 1.3.46 might allow an actor to bypass the user-configured security policy and execute AWS API operations that t...
How severe is CVE-2026-16584?
CVE-2026-16584 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-16584?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.