CVE-2026-115413

EUVD-2026-111349
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
References
https://aws.amazon.com/security/security-bulletins/2026-152-aws/
https://github.com/awslabs/mcp/security/advisories/GHSA-4prq-p2x5-w9fh
https://pypi.org/project/awslabs.aws-api-mcp-server/1.6.0/