compatibility.fyi
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Source-backed version compatibility

K3s Flannel Version Compatibility

K3s Flannel version compatibility. K3s 1.36.3+k3s1 bundles Flannel 0.28.4.

Full K3s matrixJSON data
3Project versions
3Documented constraints
2026-08-13Last verified

Quick answer

Flannel compatibility by K3s version

K3s version

1.36.3+k3s1

Documented Flannel versions

0.28.4

K3s 1.36.3+k3s1 bundles Flannel 0.28.4.

high confidence · verified 2026-08-13 · bundled network plugin

K3s version

1.35.7+k3s1

Documented Flannel versions

0.28.4

K3s 1.35.7+k3s1 bundles Flannel 0.28.4.

high confidence · verified 2026-08-13 · bundled network plugin

K3s version

1.34.10+k3s1

Documented Flannel versions

0.28.4

K3s 1.34.10+k3s1 bundles Flannel 0.28.4.

high confidence · verified 2026-08-13 · bundled network plugin

Primary evidence

Sources

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

  1. K3s 1.36 Support MatrixAccessed 2026-08-13
  2. K3s 1.35 Support MatrixAccessed 2026-08-13
  3. K3s 1.34 Support MatrixAccessed 2026-08-13