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Source-backed version compatibility

Cilium Kubernetes Version Compatibility

Cilium Kubernetes version compatibility. Cilium 1.20 docs list Kubernetes 1.33, 1.34, 1.35, and 1.36 as e2e tested and guaranteed compatible.

Full Cilium matrixJSON data
3Version groups
3Documented constraints
2026-10-08Last verified

Quick answer

Kubernetes compatibility by Cilium version

Supported and tested versions have compatibility evidence. Recommended and bundled versions describe upstream choices without establishing compatibility. Versions outside the documented coverage are unknown, not necessarily incompatible.

Cilium version

1.20

Supported Kubernetes versions

>=1.33 <1.37

Cilium 1.20 docs list Kubernetes 1.33, 1.34, 1.35, and 1.36 as e2e tested and guaranteed compatible.

high confidence · verified 2026-10-08 · runtime

Cilium version

1.19

Supported Kubernetes versions

>=1.32 <1.36

Cilium 1.19 stable docs list Kubernetes 1.32, 1.33, 1.34, and 1.35 as e2e tested and guaranteed compatible.

high confidence · verified 2026-10-08 · runtime

Cilium version

1.18

Supported Kubernetes versions

>=1.30 <1.34

Cilium 1.18 docs list Kubernetes 1.30, 1.31, 1.32, and 1.33 as e2e tested and guaranteed compatible.

high confidence · verified 2026-10-08 · runtime

Primary evidence

Sources

Every constraint above is backed by upstream documentation, tagged source, release notes, or another project-owned primary source.

  1. Cilium 1.20 Kubernetes CompatibilityAccessed 2026-10-08
  2. Cilium 1.19 Kubernetes CompatibilityAccessed 2026-10-08
  3. Cilium 1.18 Kubernetes CompatibilityAccessed 2026-10-08