Overly Permissive Trust Policy in Harmonix on AWS EKS

Bulletin ID: AWS-2025-031 Scope: AWS Content Type: Informational Publication Date: 2025/12/15 11:45 AM PST Description: Harmonix on AWS is an open source reference architecture and implementation of a Developer Platform that extends the CNCF Backstage project. We identified CVE-2025-14503 where an overly-permissive IAM trust policy in the Harmonix on AWS framework may allow authenticated users to escalate privileges via role assumption. The sample code for the EKS environment provisioning role is configured to trust the account root principal, which may enable any account principal with sts:AssumeRole permissions to assume the role with administrative privileges. Resolution: v0.3.0 through v0.4.1