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CVE-2026-115413— AWS API MCP Server OAuth Token Audience Validation Bypass

Quick assessment

Affected
AWS aws-api-mcp-server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 AWS API MCP Server 的 OAuth 认证模式中，1.6.0 版本之前缺少对令牌受众（token audience）的验证，这可能导致本地用户利用同一身份提供商为其他应用程序签发的访问令牌，以服务器配置的 AWS 凭证执行 AWS 操作。 为修复此问题，用户应升级至 1.6.0 版本，并为服务器配置预期的令牌受众或客户端 ID。

CVSS 7.8 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
AWS aws-api-mcp-server 1.3.0< 1.6.0 affected
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I. Basic Information for CVE-2026-115413

Vulnerability Information
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Vulnerability Title
AWS API MCP Server OAuth Token Audience Validation Bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
AWS aws-api-mcp-server 1.3.0 ~ 1.6.0 -

II. Public POCs for CVE-2026-115413

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-115413

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Other References for CVE-2026-115413 (3)

IV. Related Vulnerabilities

Same product: aws-api-mcp-server
Same vendor: AWS
Same weakness: CWE-346