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CVE-2026-115413 Details

Description

Missing token audience validation in the OAuth authentication mode of AWS API MCP Server before version 1.6.0 might allow local users to run AWS operations with the server's configured AWS credentials via an access token issued to another application by the same identity provider. To remediate this issue, users should upgrade to version 1.6.0 and configure the expected token audience or client ID for the server.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: AMZNCVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://aws.amazon.com/security/security-bulletins/2026-152-aws/	AMZN
https://github.com/awslabs/mcp/security/advisories/GHSA-4prq-p2x5-w9fh	AMZN
https://pypi.org/project/awslabs.aws-api-mcp-server/1.6.0/	AMZN

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-346	Origin Validation Error	AMZN

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Nov 4, 2026	CVE Modified	CISA-ADP
Oct 27, 2026	New CVE Received	AMZN