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12/07/2026 12:18 pm
TL;DR: Kubernetes is now used in production by over 80% of organisations, and 9 in 10 report a cluster or container breach in the past year, according to CNCF and the State of Kubernetes report 2024. Zero Trust segmentation and unified policy control are becoming essential because flat clusters make lateral movement and policy drift easy.
NHIMG editorial — based on content published by Zero Networks: From Flat to Segmented: Baking Security into Your K8s Environment
By the numbers:
- Kubernetes is rapidly becoming a platform of choice for many enterprises, and CNCF reports that over 80% of organizations are already using it in production.
- According to the State of Kubernetes report 2024, 9 out of 10 companies report a cluster or container breach in the past year.
- According to the same report, 46% of respondents identified revenue or customer loss as a result of a container and Kubernetes security incident.
Questions worth separating out
Q: How should security teams implement microsegmentation in Kubernetes without breaking applications?
A: Start by mapping live service-to-service communication, then define the minimum allowed paths per namespace or workload group.
Q: Why do flat Kubernetes clusters increase lateral movement risk?
A: Flat clusters leave too many internal paths open by default, so one compromised workload can often reach many others.
Q: What do teams get wrong about Kubernetes network policies?
A: They often treat policies as static configuration instead of a living governance layer.
Practitioner guidance
- Define workload communication boundaries Map which pods, namespaces, and services are allowed to communicate before enforcing rules, then review those boundaries after each deployment change.
- Centralise policy reconciliation Create one review path for Kubernetes network policy changes so YAML pushed by application teams can be validated against a unified rule view.
- Use runtime flow evidence before enforcement Capture current service-to-service communication patterns with runtime telemetry before turning on blocking controls.
What's in the full article
Zero Networks' full article covers the operational detail this post intentionally leaves for the source:
- How the product translates YAML-based Kubernetes policies into a unified rule view for review and approval.
- How eBPF monitoring is used to observe live cluster traffic with minimal performance impact.
- How native Kubernetes Network Policies support workload isolation and microsegmentation in practice.
- How the approach is positioned for compliance evidence across hybrid environments.
👉 Read Zero Networks' analysis of Kubernetes segmentation and cluster security →
Kubernetes microsegmentation: what IAM and security teams need to know?
Explore further
12/07/2026 12:32 pm
Flat Kubernetes networks create a trust problem, not just a routing problem. The article shows that cluster security fails when internal communication is treated as harmless by default. In identity terms, workload-to-workload access is still access, and it needs explicit governance rather than inherited network openness. For practitioners, this means segmentation should be evaluated as a control boundary, not an implementation detail.
A question worth separating out:
Q: Who is accountable when Kubernetes segmentation fails?
A: Accountability usually sits across platform engineering, application owners, and security governance, because each group influences policy creation and enforcement. Teams should assign clear ownership for rule review, runtime validation, and exception handling so segmentation does not become everyone’s responsibility and therefore no one’s control.
👉 Read our full editorial: Kubernetes flat networks create lateral movement risk at scale
