- The sample-apiserver aggregated conformance test has updated to use the Kubernetes v1.17.0 sample apiserver ([#84735](https://github.com/kubernetes/kubernetes/pull/84735), [@liggitt](https://github.com/liggitt)) [SIG API Machinery, Architecture, CLI and Testing]

    - [Taints and Tolerations](#taints-and-tolerations)
    - [Volumes](#volumes-2)
  - [Changes to Major Components](#changes-to-major-components)
    - [API Server](#api-server)
    - [API Server Aggregator](#api-server-aggregator)
      - [Generic API Server](#generic-api-server)
    - [Client](#client)
      - [client-go](#client-go)
    - [Cloud Provider](#cloud-provider)
      - [AWS](#aws)
      - [Azure](#azure)

- NONE ([#124327](https://github.com/kubernetes/kubernetes/pull/124327), [@ritazh](https://github.com/ritazh)) [SIG Auth]
- OpenAPI V2 will no longer publish aggregated apiserver OpenAPI for group-versions not matching the APIService specified group version ([#123624](https://github.com/kubernetes/kubernetes/pull/123624), [@Jefftree](https://github.com/Jefftree)) [SIG API Machinery and Testing]

* Resolves an issue serving aggregated APIs backed by services that respond to requests to `/` with non-2xx HTTP responses ([#79895](https://github.com/kubernetes/kubernetes/pull/79895), [@deads2k](https://github.com/deads2k))

  - Aggregated discovery requests can now timeout. Aggregated API servers must complete discovery calls within 5 seconds (other requests can take longer). Use the feature gate `EnableAggregatedDiscoveryTimeout=false` to temporarily revert behavior to the previous 30 second timeout if...

  - [Changelog since v1.25.0](#changelog-since-v1250)
  - [Important Security Information](#important-security-information-4)
    - [CVE-2022-3172: Aggregated API server can cause clients to be redirected (SSRF)](#cve-2022-3172-aggregated-api-server-can-cause-clients-to-be-redirected-ssrf)
  - [Changes by Kind](#changes-by-kind-14)
    - [API Change](#api-change-3)
    - [Feature](#feature-13)

- NONE ([#124326](https://github.com/kubernetes/kubernetes/pull/124326), [@ritazh](https://github.com/ritazh)) [SIG Auth]
- OpenAPI V2 will no longer publish aggregated apiserver OpenAPI for group-versions not matching the APIService specified group version ([#123625](https://github.com/kubernetes/kubernetes/pull/123625), [@Jefftree](https://github.com/Jefftree)) [SIG API Machinery and Testing]

- Removed the `KUBECTL_OPENAPIV3_PATCH` environment variable, as aggregated discovery has been stable since `v1.30`. ([#134130](https://github.com/kubernetes/kubernetes/pull/134130), [@ardaguclu](https://github.com/ardaguclu))

Work this cycle focused on graduating existing functions, and on making security functions more understandable for users.

  - [Changelog since v1.24.4](#changelog-since-v1244)
  - [Important Security Information](#important-security-information-3)
    - [CVE-2022-3172: Aggregated API server can cause clients to be redirected (SSRF)](#cve-2022-3172-aggregated-api-server-can-cause-clients-to-be-redirected-ssrf)