All vulnerabilities
CVE-2026-115413GHSA-4prq-p2x5-w9fh

aws-api-mcp-server: AWS API MCP Server OAuth Token Audience Validation Bypass

AWS aws-api-mcp-serverContainers & cloud
Open in ThreatlineRecord JSON
CVSS
7.8High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet
Fixed in1.6.0Fixed versionCVE List
Published27 Oct 2026Updated 27 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 1

  • aws-api-mcp-serveraffected: 1.3.0 before 1.6.0CVE List

References 3