The vulnerability stems from container configuration (shared CGROUP/USER/NET namespaces in all-in-one deployments) rather than specific code functions. The exposure occurs at the system/container orchestration level when services share namespaces, allowing cross-container access if compromised. No specific functions in the Barbican codebase are identified as vulnerable because the root cause is environmental misconfiguration rather than flawed application logic. The CWE-653 (Improper Isolation) classification supports this analysis. Without commit diffs or patch details, there's insufficient evidence to attribute the vulnerability to particular functions.