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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-16584 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  AMZN
CVSS-B 7.3 HIGH
Vector:  CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://aws.amazon.com/security/security-bulletins/2026-063-aws/ AMZN
https://github.com/awslabs/mcp/security/advisories/GHSA-29w2-fq35-v728 AMZN
https://pypi.org/project/awslabs.aws-api-mcp-server/1.3.47/ AMZN

Weakness Enumeration

CWE-ID CWE Name Source
CWE-455 Non-exit on Failed Initialization AMZN  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-16584
NVD Published Date:
07/23/2026
NVD Last Modified:
07/23/2026
Source:
AMZN