(2026-R42) 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

1.31.14-gke.2825000 · cos-121-18867-584-32 · cos-121-18867-584-32 release notes

1.32.13-gke.2567000 · cos-121-18867-584-32 · cos-121-18867-584-32 release notes

1.33.13-gke.1815000 · cos-121-18867-584-32 · cos-121-18867-584-32 release notes

1.34.12-gke.1011000 · cos-125-19216-655-40 · cos-125-19216-655-40 release notes

1.35.8-gke.1796000 · cos-125-19216-655-40 · cos-125-19216-655-40 release notes

1.38.0-gke.2240000+preview · cos-beta-133-19999-44-28 · cos-beta-133-19999-44-28 release notes