CVE-2026-115413 (GCVE-0-2026-115413)

Vulnerability from cvelistv5 – Published: 2026-10-27 18:10 – Updated: 2026-10-27 18:10
VLAI
Title
AWS API MCP Server OAuth Token Audience Validation Bypass
Summary
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.3 (High)
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
CWE
  • CWE-346 - Origin validation error
Assigner
AMZN CNA under the mitre root
CNA scorecard A 94/100 over 142 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
AWS aws-api-mcp-server Affected: 1.3.0 , < 1.6.0 (custom)
    cpe:2.3:a:aws:aws-api-mcp-server:*:*:*:*:*:*:*:*
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