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CVE-2026-115413high7.8

AWS API MCP Server OAuth Token Audience Validation Bypass

Impact

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.

Source excerpt · AMZN

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

AWS · aws-api-mcp-server

Other versions: unaffected

Version / rangeSource status
1.3.0 to before 1.6.0affected
AMZN version evidence

Original source 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.

References