CVE-2026-16584

High

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.

SeverityHigh

CVSS7.0

Exploit probability—

ProductAwslabs-aws-api-mcp-server

PublishedJul 23, 2026

First seenJul 23, 2026

Weakness typeCWE-455CWE-455

How to fix

Update

awslabs-aws-api-mcp-server1.3.47 or later

Patches

pypi.org/project/awslabs.aws-api-mcp-server/1.3.47/

Vendor advisories

Affected products

Product	Affected versions	Fixed in
awslabs-aws-api-mcp-serverPyPI	0.2.13 ≤ v < 1.3.47	1.3.47

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