CVE-2026-115413
AWS API MCP Server OAuth Token Audience Validation Bypass
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-346 |
| Vendor | aws |
| Product | aws-api-mcp-server |
| Published | Oct 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
AWS / aws-api-mcp-server
1.3.0 < 1.6.0