- Kube-apiserver: `--audit-log-version` and `--audit-webhook-version` now only support the default value of `audit.k8s.io/v1`. The v1alpha1 and v1beta1 audit log versions, deprecated since 1.13, have been removed. ([#108092](https://github.com/kubernetes/kubernetes/pull/108092), [@carlory](https://github.com/carlory))

- Audit events for API requests to deprecated API versions now include a `"k8s.io/deprecated": "true"` audit annotation. If a target removal release is identified, the audit event includes a `"k8s.io/removal-release": "<majorVersion>.<minorVersion>"` audit annotation as well. ([#92842](https://github.com/kubernetes/kubernetes/pull/92842), [@liggitt](https://github.com/liggitt))...

## Urgent Upgrade Notes 

### (No, really, you MUST read this before you upgrade)

	if err != nil {
		apiErr := errorCodes.ToAPIErr(ErrInvalidArgument)
		apiErr.Description = err.Error()
		writeErrorResponse(ctx, w, apiErr, r.URL)
		return
	}

	// Audit log tags.
	reqInfo := logger.GetReqInfo(ctx)
	reqInfo.SetTags("retention", config.String())

	configData, err := xml.Marshal(config)
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)

  - kube-apiserver v1.25.4
  - kube-apiserver v1.24.8
  - kube-apiserver v1.23.14
  - kube-apiserver v1.22.16

This vulnerability was reported by Richard Turnbull of NCC Group as part of the Kubernetes Audit


**CVSS Rating:** Medium (6.5) [CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)

- `kube-apiserver` added:
  - `alpha` support (guarded by the `ServiceAccountTokenJTI` feature gate) for adding a `jti` (JWT ID) claim to service account tokens it issues, adding an `authentication.kubernetes.io/credential-id` audit annotation in audit logs when the tokens are issued, and `authentication.kubernetes.io/credential-id` entry in the extra user info when the token is used to authenticate.

- Added `auditAnnotations` to `ValidatingAdmissionPolicy`, enabling CEL to be used to add audit annotations to request audit events.
  Added `validationActions` to `ValidatingAdmissionPolicyBinding`, enabling validation failures to be handled by any combination of the warn, audit and deny enforcement actions. ([#115973](https://github.com/kubernetes/kubernetes/pull/115973), [@jpbetz](https://github.com/jpbetz))

	opts.sessionPolicy = sp

	return ctx, cred, opts, createReq, targetUser, APIError{}
}

// setReqInfoPolicyName will set the given policyName as a tag on the context's request info,
// so that it appears in audit logs.
func setReqInfoPolicyName(ctx context.Context, policyName string) {
	reqInfo := logger.GetReqInfo(ctx)
	reqInfo.SetTags("policyName", policyName)

- Adds apiserver.latency.k8s.io/authentication annotation to the audit log to record the time spent authenticating slow requests.

- The EndpointSlice controller now waits for EndpointSlice and Node caches to be synced before starting. ([#94086](https://github.com/kubernetes/kubernetes/pull/94086), [@robscott](https://github.com/robscott)) [SIG Apps and Network]
- The audit event sourceIPs list will now always end with the IP that sent the request directly to the API server. ([#87167](https://github.com/kubernetes/kubernetes/pull/87167), [@tallclair](https://github.com/tallclair)) [SIG API Machinery and Auth]