CVE-2026-115413 AWS API MCP Server - Authentication Bypass

AWS API MCP Server < 1.6.0 contains an authentication bypass caused by missing token audience validation in OAuth mode, letting local users run AWS operations with server credentials via tokens issued to other applications, exploit requires local access.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.10% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
27 October 2026
Updated
29 October 2026
Weakness
CWE-346

Vendor fix

Upgrade to version 1.6.0 and configure expected token audience or client ID.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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