CVE-2026-115413

high

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

https://pypi.org/project/awslabs.aws-api-mcp-server/1.6.0/

https://github.com/awslabs/mcp/security/advisories/GHSA-4prq-p2x5-w9fh

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-111349

https://aws.amazon.com/security/security-bulletins/2026-152-aws/

Details

Source: Mitre, NVD

Published: 2026-10-27

Updated: 2026-10-28

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

CVSS v4

Base 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

Severity: High

EPSS

EPSS: 0.00097