CVE-2026-115413

AWS API MCP Server OAuth Token Audience Validation Bypass

Published Oct 27, 2026 CVSS 4.0 · 7.3 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

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

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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
AMZN
Published
Updated
Nov 4, 2026, 8:20 PM
Reserved
Oct 22, 2026, 1:11 PM
Status
Awaiting Analysis
Published
Oct 27, 2026, 7:17 PM
Modified
Nov 4, 2026, 9:17 PM