Skip to main content

Anyscale platform release notes - April 2026

View Markdown

Anyscale platform release notes - April 2026

Use this page to learn about new features and improvements to the Anyscale platform released in April 2026, including the Anyscale console, CLI, and SDK.

To learn about new features added as part of Ray releases, see Ray release highlights.

Security advisory: CVE-2026-31431 ("CopyFail")​

April 30, 2026

Anyscale published a security advisory for CVE-2026-31431, a Linux kernel vulnerability in the algif_aead crypto module. For affected systems, mitigation steps, Kubernetes guidance, and the patched image timeline, see CVE-2026-31431 (CopyFail).

Configure head node fault tolerance for Kubernetes clouds​

April 29, 2026

Anyscale now supports enabling head node fault tolerance for Kubernetes-backed cloud resources. Add a Kubernetes-managed Redis endpoint to your cloud resource configuration to enable. See Kubernetes cloud resource example.

Reduced memory oversubscription on Ray clusters​

April 29, 2026

Anyscale is reducing default memory allocation to align with open-source Ray defaults. Tasks and actors now reserve 70% of node system memory, and the object store reserves 30%. Previously, tasks and actors reserved 100% of node memory, and the object store reserved an additional 30%.

This change reduces out-of-memory errors caused by oversubscription, especially for Ray Data workloads. Workloads that explicitly set the memory parameter on Ray tasks or actors may see lower concurrency under the new defaults. To override the automatic memory setting, specify memory per node manually in your compute config. See Configure Ray node resources.

Anyscale CLI version 0.26.99 released​

April 29, 2026

A new version of the Anyscale CLI and SDK is now available. See Version 0.26.99 release notes.

Anyscale CLI version 0.26.98 released​

April 28, 2026

A new version of the Anyscale CLI and SDK is now available. See Version 0.26.98 release notes.

Anyscale CLI version 0.26.97 released​

April 27, 2026

A new version of the Anyscale CLI and SDK is now available. See Version 0.26.97 release notes.

Ray 2.55.1 released​

April 22, 2026

Ray 2.55.1 is available as an Anyscale base image. See Ray 2.55.1 release highlights.

For all Python and system dependencies, see Anyscale base images.

Anyscale agent skills now available​

April 22, 2026

Anyscale agent skills are now available for Claude Code and Cursor. Each skill guides your AI coding agent through requirements gathering, code generation, and deployment for a specific workload type or platform operation. Skills are distributed through the Anyscale CLI and install in one command.

See Anyscale agent skills.

Anyscale CLI version 0.26.96 released​

April 22, 2026

A new version of the Anyscale CLI and SDK is now available. See Version 0.26.96 release notes.

Anyscale operator for Kubernetes version 1.5.1 released​

April 15, 2026

Anyscale has released version 1.5.1 of the Anyscale operator for Kubernetes. See the Anyscale operator GitHub page for release details.

  • S3 path addressing style fix: Fixed a bug where setting .Values.global.aws.s3.usePathStyle or .Values.credentialMount.aws.createSecret.addressingStyle: path caused the operator to use S3 path addressing style but not the workloads it manages. Both the operator and its managed workloads now consistently use path addressing style when either setting is enabled.
  • Proxy environment variable fix: Fixed a bug where the operator ignored values set by HTTPS_PROXY, HTTP_PROXY, and NO_PROXY.

Anyscale CLI version 0.26.95 released​

April 15, 2026

A new version of the Anyscale CLI and SDK is now available. See Version 0.26.95 release notes.

Anyscale CLI version 0.26.94 released​

April 14, 2026

A new version of the Anyscale CLI and SDK is now available. See Version 0.26.94 release notes.

Ray 2.55.0 released​

April 13, 2026

Ray 2.55.0 is available as an Anyscale base image. See Ray 2.55.0 release highlights.

For all Python and system dependencies, see Anyscale base images.

Support for new instance types on AWS and Google Cloud​

April 7, 2026

Anyscale now supports the following instance types:

  • AWS: g6f and m8azn
  • Google Cloud: n4d-standard and n4d-highmem

The g6f instances use a custom AMI maintained separately from the standard release cycle and are currently available to customers on request. Anyscale is gathering feedback to inform broader availability.

See Compute configuration on Anyscale and pricing details for supported machine types.

Anyscale CLI version 0.26.93 released​

April 7, 2026

A new version of the Anyscale CLI and SDK is now available. See Version 0.26.93 release notes.