Cluster autoscaler add-on version change log

Patch updates
Patch updates are delivered automatically by IBM and don't contain any feature updates or changes in the supported add-on and cluster versions.
Release updates
Release updates contain new features or changes in the supported add-on or cluster versions. You must manually apply release updates to your cluster autoscaler add-on.

To view a list of add-ons and the supported cluster versions, run the following command or see the Supported cluster add-ons table.

ibmcloud oc cluster addon versions

Supported versions

Supported Cluster autoscaler add-on versions
Add-on version Supported OpenShift versions
2.0.0 >=4.17.0 <4.22.0
1.2.4 >=4.15.0 <4.22.0
1.1.0 >=4.6.0 <4.13.0

Review the version history for Cluster autoscaler.

Version 2.0.0

07 July 2026, Version 2.0.0 - v200-12-0_351296784

  • Resolves the following CVEs: CVE-2026-42507.
  • Updates Go to version 1.25.11.
  • Update storage secret sidecar 1.3.56
  • 1.30.7 200-12
  • 1.31.5 200-12
  • 1.32.7 200-12
  • 1.33.4 200-12
  • 1.34.4 200-12
  • 1.35.0 200-12

30 April 2026, Version 2.0.0 - v200-7-0_332133224

  • Update storage secret sidecar 1.3.44
  • 1.30.7 200-7
  • 1.31.5 200-7
  • 1.32.7 200-7
  • 1.33.4 200-7
  • 1.34.4 200-7
  • 1.35.0 200-7

24 March 2026, Version 2.0.0 - v200-6-0_326846817

  • Update storage secret sidecar 1.3.43
  • Fix issue where scale down to 0 was not working in CA 1.34
  • 1.30.7 200-6
  • 1.31.5 200-6
  • 1.32.5 200-6
  • 1.33.3 200-6
  • 1.34.2 200-6.

18 February 2026, Version 2.0.0 - v200-4_316755565

  • Resolves the following CVEs: CVE-2025-13281.
  • Update storage secret sidecar v1.3.40
  • 1.30.7 200-4
  • 1.31.5 200-4
  • 1.32.5 200-4
  • 1.33.3 200-4
  • 1.34.2 200-4.

2 December 2025, Version patch update 2.0.0-2_302959219

  • Adds support for scale down to 0.
  • Adds support for cluster version 1.34.
  • Updates base golang version to 1.25.4.
  • Updates storage secret sidecar 1.3.37.
  • Image tags: 1.30.7-v200-2, 1.31.5-v200-2, 1.32.4-v200-2, 1.33.2-v200-2, 1.34.1-v200-2.

Version 1.2.4

07 July 2026, Version 1.2.4 - v124-13-0_351834855

  • Resolves the following CVEs: CVE-2026-27145, and CVE-2026-42507.
  • Updates Go to version 1.25.11.
  • Update storage secret sidecar 1.3.56
  • 1.28.7 124-13
  • 1.29.5 124-13
  • 1.30.7 124-13
  • 1.31.5 124-13
  • 1.32.7 124-13
  • 1.33.4 124-13
  • 1.34.3 124-13.

24 March 2026, Version 1.2.4 - v124-8-0_326847250

  • Update storage secret sidecar 1.3.43
  • 1.28.7 124-8
  • 1.29.5 124-8
  • 1.30.7 124-8
  • 1.31.5 124-8
  • 1.32.5 124-8
  • 1.33.3 124-8
  • 1.34.2 124-8.

16 February 2026, Version 1.2.4 - v124-7_312863411

  • Resolves the following CVEs: CVE-2025-4563, CVE-2025-5187, CVE-2025-13281, CVE-2025-30204, and CVE-2025-22872.
  • Updates Go to version 1.25.4.
  • Update storage secret sidecar v1.3.39
  • Adds support for cluster version 1.34.
  • 1.34 has functionality to cordon node before terminating via the --cordon-node-before-terminating flag.
  • 1.28.7 124-7
  • 1.29.5 124-7
  • 1.30.7 124-7
  • 1.31.5 124-7
  • 1.32.5 124-7
  • 1.33.3 124-7
  • 1.34.2 124-7.

18 July 2025, Version patch update 1.2.4_680.

  • Resolves the following CVEs: CVE-2025-3576, CVE-2025-4673, CVE-2025-4802.
  • Updates Go to 1.23.10
  • Updates the storage-secret-sidecar image to v1.3.30
  • Image tags: 1.28.7 124-1, 1.29.5 124-1, 1.30.4 124-1, 1.31.1 124-1, 1.32.1 124-1.

22 April 2025, Version patch update 1.2.4_629.

  • Adds support for version 1.32
  • Updates golang version to 1.23.7
  • Updates the storage-secret-sidecar image to v1.3.26
  • Updates open source source cluster autoscaler code to latest versions for: 1.28.7, 1.29.5, 1.30.4, 1.31.2, 1.32.1.
  • Image tags: 1.28.7 124-0, 1.29.5 124-0, 1.30.4 124-0, 1.31.1 124-0, 1.32.1 124-0.

Beginning in version 1.2.4 the maxEmptyBulkDelete option is no longer supported. Remove this option from your configmap by running kubectl edit configmap iks-ca-configmap -n kube-system command and deleting the option. As a replacement, you can use the maxScaleDownParallelism option which was added in version 1.2.4. For more information, see the configmap reference.

Change log for patch update 1.2.4_793, released 18th September 2025

  • Adds support for cluster version 1.33.
  • Updates Golang version to 1.24.0.
  • Updates storage secret sidecar 1.3.32.
  • Resolves the following CVEs: CVE-2025-4563.
  • The --max-empty-bulk-delete option is no longer supported. Instead, use the --max-scale-down-parallelism option.
  • Adds GPU support with the --scale-down-gpu-utilization-threshold option for Nvidia vendors.
  • Image tags: 1.28.7 124-4, 1.29.5 124-4, 1.30.5 124-4, 1.31.3 124-4, 1.32.2 124-4, 1.33.0 124-4.

Version 1.2.3

25 July 2025, Version patch update 1.2.3_716.

  • Resolves the following CVEs: CVE-2025-3576, CVE-2025-4673, CVE-2025-4802, CVE-2025-0426, CVE-2024-9042, CVE-2025-0426, CVE-2024-9042.
  • Updates Go to 1.23.10.
  • Updates storage secret sidecar to 1.3.30.
  • Image tags: 1.28.7 123-3, 1.29.5 123-3, 1.30.4 123-3, 1.31.2 123-3.

10 March 2025, Version patch update 1.2.3_540

31 October 2024, Version patch update 1.2.3_512

  • Adds support for version 1.31.
  • Updates the storage-secret-sidecar image to v1.3.16.
  • Image tags: 1.27.3 123-1, 1.28.0 123-1, 1.29.0 123-1, 1.30.2 123-1, 1.31.0 123-1

Version 1.2.2

15 July 2024, Version patch update 1.2.2_466

  • Updates the storage-secret-sidecar image to v1.3.10.
  • Resolves CVE-2024-28182 and CVE-2023-2953
  • Image tags: 1.24.0-122-0, 1.25.0-122-0, 1.26.4-122-0, 1.27.3-122-0, 1.28.0-122-0, 1.29.0-122-0.

20 June 2024, Version patch update 1.2.2_452

  • Adds support for version 1.30.
  • Changes the format of the cluster-autoscaler-status configmap. For more information, see the Community Kubernetes pull request.
  • Image tags: 1.22.0-122-0, 1.23.0-122-0, 1.24.0-122-0, 1.25.0-122-0, 1.26.4-122-0, 1.27.3-122-0, 1.28.0-122-0, 1.29.0-122-0, 1.30.0-122-0.

Version 1.2.1

15 July 2024, Version patch update 1.2.1_467

  • Updates the storage-secret-sidecar image to v1.3.10.
  • Resolves CVE-2024-28182 and CVE-2023-2953
  • Image tags: 1.24.0-121-2, 1.25.0-121-2, 1.26.4-121-2, 1.27.3-121-2, 1.28.0-121-2, 1.29.0-121-2.

21 June 2024, Version patch update 1.2.1_444

  • Updates the storage-secret-sidecar image to v1.3.9.
  • Updates golang version to 1.21.11.
  • Image tags: 1.24.0-121-2, 1.25.0-121-2, 1.26.4-121-2, 1.27.3-121-2, 1.28.0-121-2, 1.29.0-121-2.

05 May 2024, Version patch update 1.2.1_425

  • Updates the storage-secret-sidecar image to v1.3.7
  • Fixes a utilization calculation bug during scale down.
  • Image tags: 1.22.0-121-1, 1.23.0-121-1, 1.24.0-121-1, 1.25.0-121-1, 1.26.4-121-1, 1.27.3-121-1, 1.28.0-121-1, and 1.28.0-121-1.

02 April 2024, Version patch update 1.2.1_418

  • Updates the storage-secret-sidecar image to v1.3.6
  • Adds support for drainPriorityConfig, dynamicNodeDeleteDelayAfterTaintEnabled, loggingFormat, emitPerNodegroupMetrics, kubeApiContentType, featureGates parameters.
  • Image tags: 1.22.0-121-0, 1.23.0-121-0, 1.24.0-121-0, 1.25.0-121-0, 1.26.4-121-0, 1.27.3-121-0, 1.28.0-121-0.

28 February 2024, Version patch update 1.2.1_395

  • Adds support for cluster version 1.29.
  • Image tags: 1.22.0-121-0, 1.23.0-121-0, 1.24.0-121-0, 1.25.0-121-0, 1.26.4-121-0, 1.27.3-121-0, 1.28.0-121-0.

Version 1.2.0

15 July 2024, Version patch update 1.2.0_468

  • Updates the storage-secret-sidecar image to v1.3.10.
  • Resolves CVE-2024-28182 and CVE-2023-2953
  • Image tags: 1.24.0-120-6, 1.25.0-120-6, 1.26.4-120-6, 1.27.3-120-6, 1.28.0-120-6.

21 June 2024, Version patch update 1.2.0_443

  • Updates the storage-secret-sidecar image to v1.3.9.
  • Updates golang version to 1.21.11.
  • Image tags: 1.24.0-120-6, 1.25.0-120-6, 1.26.4-120-6, 1.27.3-120-6, 1.28.0-120-6.

05 May 2024, Version patch update 1.2.0_426

  • Updates the storage-secret-sidecar image to v1.3.7
  • Fixes a utilization calculation bug during scale down.
  • Image tags: 1.22.0-120-5, 1.23.0-120-5, 1.24.0-120-5, 1.25.0-120-5, 1.26.4-120-5, 1.27.3-120-5, and 1.28.0-120-5.

02 April 2024, Version patch update 1.2.0_410

  • Updates the storage-secret-sidecar image to v1.3.6
  • Images tags: 1.22.0-120-4, 1.23.0-120-4, 1.24.0-120-4, 1.25.0-120-4, 1.26.4-120-4, 1.27.3-120-4, 1.28.0-120-4.

21 February 2024, Version patch update 1.2.0_365

  • Updated the storage-secret-sidecar image to v1.3.5.
  • Image tags: 1.22.0-120-4, 1.23.0-120-4, 1.24.0-120-4, 1.25.0-120-4, 1.26.4-120-4, 1.27.3-120-4, and 1.28.0-120-4.

16 January 2024, Version patch update 1.2.0_322

  • Fixes CVE-2007-4559, CVE-2023-22745, CVE-2023-4641
  • Updated the storage-secret-sidecar image to v1.3.4
  • Fixes an issue while updating custom variables via add-on.
  • Adds support for the maxPodEvictionTime parameter.
  • Image tags: 1.22.0-120-3, 1.23.0-120-3, 1.24.0-120-3, 1.25.0-120-3, 1.26.4-120-3, 1.27.3-120-3, and 1.28.0-120-3.

27 November 2023, Version patch update 1.2.0_290

  • Fixes CVE-2007-4559, CVE-2023-22745, and CVE-2023-4641.
  • Updated the storage-secret-sidecar image to v1.3.3.
  • Image tags: 1.22.0-120-2, 1.23.0-120-2, 1.24.0-120-2, 1.25.0-120-2, 1.26.4-120-2, 1.27.3-120-2, and 1.28.0-120-2.

15 November 2023, Version patch update 1.2.0_228

  • Adds support for cluster version 1.28
  • Image tags: 1.22.0-120-2, 1.23.0-120-2, 1.24.0-120-2, 1.25.0-120-2, 1.26.4-120-2, 1.27.3-120-2, and 1.28.0-120-2.

Version 1.0.9

02 April 2024, Version patch update 1.0.9_411

  • Updates the storage-secret-sidecar image to v1.2.33
  • Images tags: 1.22.0-109-3, 1.23.0-109-3, 1.24.0-109-3, 1.25.0-109-3, 1.26.1-109-3, 1.27.2-109-3.

21 February 2024, Version patch update 1.0.9_377

  • Updated the storage-secret-sidecar image to v1.2.31.
  • Fixed naming issues with the nodeDeleteDelayAfterTaint and maxNodesTotal parameters.
  • Image tags: 1.22.0-109-3, 1.23.0-109-3, 1.24.0-109-3, 1.25.0-109-3, 1.26.1-109-3, 1.27.2-109-3.

16 January 2024, Version patch update 1.0.9_328

27 November 2023, Version patch update 1.0.9_290

  • Fixes CVE-2007-4559, CVE-2023-22745, and CVE-2023-4641.
  • Updated the storage-secret-sidecar image to v1.2.29.
  • Image tags: 1.22.0-109-2, 1.23.0-109-2, 1.24.0-109-2, 1.25.0-109-2, 1.26.1-109-2, 1.27.2-109-2.

13 November 2023, Version patch update 1.0.9_195

  • Updates the storage-secret-sidecar image to v1.2.28.
  • Updates Golang to 1.20.10.
  • Image tags: 1.22.0-109-2, 1.23.0-109-2, 1.24.0-109-2, 1.25.0-109-2, 1.26.1-109-2, 1.27.2-109-2.

04 October 2023, Version patch update 1.0.9_134

  • Adds constraints to allow add-on deployment on amd64 architecture only.
  • Image tags: 1.22.0-109-1, 1.23.0-109-1, 1.24.0-109-1, 1.25.0-109-1, 1.26.1-109-1, 1.27.2-109-1.

16 February 2024, Version patch update 1.1.0_362

  • Image tags: 1.21.0 110-10, 1.22.0 110-10, 1.23.0 110-10, 1.24.0 110-10, 1.25.0 110-10.
  • Updates golang version to 1.20.11.

27 November 2023, Version patch update 1.0.8_292

  • Fixes CVE-2007-4559, CVE-2023-22745, and CVE-2023-4641.
  • Updated the storage-secret-sidecar image to v1.2.29.
  • Image tags: 1.20.0 108-5, 1.21.0 108-5, 1.22.0 108-5, 1.23.0 108-5, 1.24.0 108-5, 1.25.0 108-5, and 1.26.0 108-5.

13 November 2023, Version patch update 1.0.8_233

  • Updates the storage-secret-sidecar image to v1.2.28.
  • Updates Golang to 1.20.10.
  • Image tags: 1.20.0 108-5, 1.21.0 108-5, 1.22.0 108-5, 1.23.0 108-5, 1.24.0 108-5, 1.25.0 108-5, and 1.26.0 108-5.

27 November 2023, Version patch update 1.0.7_291

  • Fixes CVE-2007-4559, CVE-2023-22745, and CVE-2023-4641.
  • Updated the storage-secret-sidecar image to v1.2.29.
  • Image tags: 1.20.0 107-7, 1.21.0 107-7, 1.22.0 107-7, 1.23.0 107-7, 1.24.0 107-7, and 1.25.0 107-7.

13 November 2023, Version patch update 1.0.7_185

  • Updates the storage-secret-sidecar image to v1.2.28.
  • Updates Golang to 1.20.10.
  • Image tags: 1.20.0 107-7, 1.21.0 107-7, 1.22.0 107-7, 1.23.0 107-7, 1.24.0 107-7, and 1.25.0 107-7.