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OpenAdvisories
High · 8.5 CVE-2026-125271 EUVD-2026-121327

Incorrect normalization of operation names in the custom security policy enforcement in awslabs aws-api-mcp-server before 1.5.1 might allow…

Published Nov 10, 2026 · Updated Nov 10, 2026 · Assigned by AMZN

Description

Incorrect normalization of operation names in the custom security policy enforcement in awslabs aws-api-mcp-server before 1.5.1 might allow an actor to execute AWS API operations across AWS services that the operator's security policy was configured to deny or require elicitation for, via calls to operations whose names contain consecutive capital letters.

To remediate this issue, users should upgrade to version 1.5.1.

Affected products

VendorProductAffectedFixed
aws aws-api-mcp-server 0.2.13 <1.5.1 —

References