Google Kubernetes Engine Updates Include New Versions and Security Fixes

(2026-R20) Security updates This release includes new GKE versions that use updated Container-Optimized OS images. These updated images are cumulative, incorporating security fixes from all Container-Optimized OS versions released since the previous GKE release. To identify the specific vulnerabilities that were resolved in each updated Container-Optimized OS image, see the Security release notes for that image. The following table includes links to the release notes for each updated Container-Optimized OS image: GKE version Container-Optimized OS version Details 1.36.0-gke.2253000 cos-beta-12

(2026-R20) Version updates GKE cluster versions have been updated. New versions available for upgrades and new clusters. The following versions are now available for new GKE clusters, and for manual control plane upgrades and node upgrades for existing clusters. For more information about versioning and upgrades, see GKE versioning and support and About GKE cluster upgrades . Note : Your clusters might not have these versions available. Rollouts are already in progress when we publish the release notes, and can take multiple days to complete across all Google Cloud zones. The following version

(2026-R20) Version updates Note : Your clusters might not have these versions available. Rollouts are already in progress when we publish the release notes, and can take multiple days to complete across all Google Cloud zones. The following versions are now available in the Stable channel: 1.33.11-gke.1013000 1.34.6-gke.1307000 1.35.3-gke.1389002

(2026-R20) Version updates Note : Your clusters might not have these versions available. Rollouts are already in progress when we publish the release notes, and can take multiple days to complete across all Google Cloud zones. Version 1.35.3-gke.1389002 is now available in the Regular channel.

(2026-R20) Version updates Note : Your clusters might not have these versions available. Rollouts are already in progress when we publish the release notes, and can take multiple days to complete across all Google Cloud zones. The following versions are now available in the Rapid channel: 1.33.12-gke.1000000 1.34.8-gke.1000000 1.35.5-gke.1000000 1.36.0-gke.2253000

(2026-R20) Version updates Note : Your clusters might not have these versions available. Rollouts are already in progress when we publish the release notes, and can take multiple days to complete across all Google Cloud zones. The following versions are now available: 1.33.12-gke.1000000 1.34.8-gke.1000000 1.35.3-gke.1389002 1.35.5-gke.1000000 The following node versions are now available: 1.30.14-gke.2530000 1.31.14-gke.1942000 1.32.13-gke.1551000 1.33.12-gke.1000000 1.34.8-gke.1000000 1.35.3-gke.1389002 1.35.5-gke.1000000

(2026-R20) Version updates Note : Your clusters might not have these versions available. Rollouts are already in progress when we publish the release notes, and can take multiple days to complete across all Google Cloud zones. The following versions are now available in the Extended channel: 1.30.14-gke.2530000 1.31.14-gke.1942000 1.32.13-gke.1551000 1.35.3-gke.1389002