diff --git a/cluster-autoscaler/go.mod b/cluster-autoscaler/go.mod
index f2290c3eddba..c7a67a23a823 100644
--- a/cluster-autoscaler/go.mod
+++ b/cluster-autoscaler/go.mod
@@ -60,7 +60,7 @@ require (
 	k8s.io/component-base v0.35.0
 	k8s.io/component-helpers v0.35.0
 	k8s.io/dynamic-resource-allocation v0.35.0
-	k8s.io/klog/v2 v2.130.1
+	k8s.io/klog/v2 v2.140.0
 	k8s.io/kube-scheduler v0.0.0
 	k8s.io/kubelet v0.35.0
 	k8s.io/kubernetes v1.35.0
diff --git a/cluster-autoscaler/go.sum b/cluster-autoscaler/go.sum
index 4e3a6d40f0fc..78a2f2303664 100644
--- a/cluster-autoscaler/go.sum
+++ b/cluster-autoscaler/go.sum
@@ -656,8 +656,8 @@ k8s.io/dynamic-resource-allocation v0.35.0 h1:St6dsCCylLg3HiFPcyHzFF8YQO6yziUDaV
 k8s.io/dynamic-resource-allocation v0.35.0/go.mod h1:uaFga3VJtwyfpfZwpuJG7mlurWGQaaiGUa+QZmooz2U=
 k8s.io/gengo/v2 v2.0.0-20250922181213-ec3ebc5fd46b h1:gMplByicHV/TJBizHd9aVEsTYoJBnnUAT5MHlTkbjhQ=
 k8s.io/gengo/v2 v2.0.0-20250922181213-ec3ebc5fd46b/go.mod h1:CgujABENc3KuTrcsdpGmrrASjtQsWCT7R99mEV4U/fM=
-k8s.io/klog/v2 v2.130.1 h1:n9Xl7H1Xvksem4KFG4PYbdQCQxqc/tTUyrgXaOhHSzk=
-k8s.io/klog/v2 v2.130.1/go.mod h1:3Jpz1GvMt720eyJH1ckRHK1EDfpxISzJ7I9OYgaDtPE=
+k8s.io/klog/v2 v2.140.0 h1:Tf+J3AH7xnUzZyVVXhTgGhEKnFqye14aadWv7bzXdzc=
+k8s.io/klog/v2 v2.140.0/go.mod h1:o+/RWfJ6PwpnFn7OyAG3QnO47BFsymfEfrz6XyYSSp0=
 k8s.io/kms v0.35.0 h1:/x87FED2kDSo66csKtcYCEHsxF/DBlNl7LfJ1fVQs1o=
 k8s.io/kms v0.35.0/go.mod h1:VT+4ekZAdrZDMgShK37vvlyHUVhwI9t/9tvh0AyCWmQ=
 k8s.io/kube-openapi v0.0.0-20250910181357-589584f1c912 h1:Y3gxNAuB0OBLImH611+UDZcmKS3g6CthxToOb37KgwE=
diff --git a/cluster-autoscaler/main.go b/cluster-autoscaler/main.go
index 654e7c5a6d31..08f1d79ef309 100644
--- a/cluster-autoscaler/main.go
+++ b/cluster-autoscaler/main.go
@@ -18,6 +18,7 @@ package main
 
 import (
 	"context"
+	"flag"
 	"net/http"
 	"os"
 	"os/signal"
@@ -191,6 +192,12 @@ func mustBuildAutoscaler(ctx context.Context, opts config.AutoscalingOptions, de
 func main() {
 	klog.InitFlags(nil)
 
+	// Opt into new klog behavior where -stderrthreshold is honored even when
+	// -logtostderr=true (kubernetes/klog#212, kubernetes/klog#432).
+	flag.Set("legacy_stderr_threshold_behavior", "false")
+	// Preserve backward-compatible default; users can override to WARNING or ERROR.
+	flag.Set("stderrthreshold", "INFO")
+
 	featureGate := utilfeature.DefaultMutableFeatureGate
 	loggingConfig := logsapi.NewLoggingConfiguration()