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.
Published: 2026-10-27
Score: 7.3 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 04 Nov 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 27 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
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.
Title AWS API MCP Server OAuth Token Audience Validation Bypass
First Time appeared Aws
Aws aws-api-mcp-server
Weaknesses CWE-346
CPEs cpe:2.3:a:aws:aws-api-mcp-server:*:*:*:*:*:*:*:*
Vendors & Products Aws
Aws aws-api-mcp-server
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 7.3, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Subscriptions

Aws Aws-api-mcp-server
cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2026-11-04T20:20:25.951Z

Reserved: 2026-10-22T13:11:03.305Z

Link: CVE-2026-115413

cve-icon Vulnrichment

Updated: 2026-11-04T20:06:22.578Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-27T19:17:10.593

Modified: 2026-11-04T21:17:51.477

Link: CVE-2026-115413

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-27T20:30:08Z

Weaknesses