CVE-2026-54495 open-feature CVE debrief

Who should care

Multi-tenant cluster administrators and security teams should assess exposure, prioritize remediation, and monitor for suspicious activity. Security teams should verify vendor remediation and inventory OpenFeature Operator deployments. Administrators should review compensating controls for exposed systems and track exceptions and retest remediated assets.

Why it matters

CVE-2026-54495 allows a tenant to access cluster-scoped resources in multi-tenant OpenFeature Operator deployments. Administrators should assess exposure, prioritize remediation, and monitor for suspicious activity.

• Verify exposure in multi-tenant clusters
• Assess potential for unauthorized access to cluster-scoped resources
• Monitor for suspicious activity
• Prioritize remediation for affected deployments

Technical summary

The OpenFeature Operator allows users to expose feature flags to applications. In version 0.9.2 and earlier, a tenant who can create a controller-owned workload can use the openfeature.dev/featureflagsource annotation with NAMESPACE/NAME syntax to reference a FeatureFlagSource or InProcessConfiguration in another namespace. This allows unauthorized access to cluster-scoped resources in multi-tenant clusters. Single-tenant clusters are not impacted. The vulnerability is remediated in version 0.9.3 and later, which restricts access to cluster-scoped resources.

Defensive priority

Assess exposure in multi-tenant clusters, verify vendor remediation

Recommended defensive actions

• Assess exposure in multi-tenant clusters
• Verify vendor remediation
• Inventory OpenFeature Operator deployments
• Monitor for suspicious activity
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets
• Track exceptions and retest remediated assets

Evidence notes

The OpenFeature Operator allows users to expose feature flags to applications. In version 0.9.2 and earlier, a tenant who can create a controller-owned workload can use the openfeature.dev/featureflagsource annotation with NAMESPACE/NAME syntax to reference a FeatureFlagSource or InProcessConfiguration in another namespace. Evidence is limited to public CVE and NVD records.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.