As reported by Dark Reading, confused deputy vulnerabilities continue to plague two of the most widely deployed cloud platforms — Google Cloud and Microsoft Azure — creating conditions where attackers can escalate to administrative-level permissions without triggering conventional access control alerts.
Why "Confused Deputy" Is More Than a Classic Security Problem
The confused deputy problem is not new — it dates back to 1988 in operating systems research — but its manifestation in cloud-native architectures represents a particularly dangerous evolution. In cloud environments, the "deputy" is typically a trusted service, function, or cross-tenant component that acts on behalf of users or other services. When that intermediary can be manipulated to perform actions it was never explicitly authorized for, the consequences aren't just local privilege escalation — they can span entire tenants, subscriptions, or organizational hierarchies.
What makes this category uniquely dangerous in hyperscaler environments is the implicit trust baked into managed service interactions. Cloud providers must allow their own services to communicate internally, and that necessary trust surface becomes an attacker's opportunity. Unlike a misconfigured IAM policy that an audit might catch, confused deputy exploitation often looks like legitimate service-to-service communication — making it exceptionally difficult to detect with standard logging or anomaly detection.
Who Is Most Exposed
Organizations most at risk are those with complex, multi-service architectures that rely heavily on:
Mid-market and enterprise organizations that have migrated to cloud-native architectures without conducting a thorough service-to-service permission audit are particularly vulnerable. Many of these environments were built for speed, with least-privilege principles applied inconsistently.
The Detection Gap
One of the most troubling aspects of confused deputy exploitation is how cleanly it evades traditional detection. Because the malicious action is taken by a legitimate, trusted service — rather than by a rogue identity — SIEM rules and cloud-native threat detection (like Microsoft Defender for Cloud or Google Security Command Center) may not surface anomalous behavior. Attackers who understand the trust relationships in a target environment can effectively launder privilege escalation through legitimate service calls.
Detection must shift from identity-centric alerting to intent-and-context analysis — asking not just "who made this API call" but "does this service have a legitimate reason to be acting in this context at this time?"
Broader Implications for Cloud Security Architecture
This class of vulnerabilities should prompt a rethinking of how organizations approach cloud trust boundaries. The shared responsibility model is well understood in theory, but confused deputy flaws expose a gray zone: vulnerabilities that exist within the provider's service fabric but are exploitable based on how customer workloads are configured. Customers cannot patch a cloud provider's internal service trust logic — but they can reduce their exposure surface through architectural discipline.
This is also a call to action for cloud providers. Security teams at Google and Microsoft must invest in making service-to-service trust relationships transparent and auditable, giving customers the visibility they need to reason about their own exposure.
Shield53 Recommendations
Immediate Actions
- Audit all service account and managed identity permissions — specifically look for over-permissioned identities attached to serverless functions, build pipelines, and automation accounts. Remove any permissions not actively required.
- Map your cross-service trust chains — document every integration where one service acts on behalf of another. Tools like Google Cloud's Policy Analyzer and Azure's IAM Access Reviews can help surface implicit trust paths.
- Implement resource-based policies with explicit deny conditions — don't rely solely on identity-based policies. Add resource-level conditions that restrict which principals can invoke sensitive operations, regardless of what a calling service claims.
- Enable and review data access audit logs — in GCP, ensure Data Access Audit Logs are enabled for all services. In Azure, ensure Diagnostic Settings export to a centralized Log Analytics workspace with retention policies.
- Restrict cross-tenant delegations — review all third-party vendor access grants and ensure they use scoped, time-limited permissions rather than standing administrative roles.
Strategic Guidance
- Incorporate confused deputy attack paths into your cloud threat modeling exercises — particularly when onboarding new services or SaaS integrations.
- Require your cloud security team to review vendor security advisories from Google Project Zero, Microsoft MSRC, and independent researchers focused on cloud-native attack surfaces.
- Consider engaging a cloud security specialist to conduct a privilege escalation path analysis — automated CSPM tools often miss chained, logic-based escalation routes.
