diff --git a/cmd/recorder/main.go b/cmd/recorder/main.go
index 185daf82709..aca6b1b58d5 100644
--- a/cmd/recorder/main.go
+++ b/cmd/recorder/main.go
@@ -73,6 +73,11 @@ func run(ctx context.Context) error {
 	// Support default klog verbosity (so that we can see client-go traffic)
 	klogFlagSet := goflag.NewFlagSet("klog", goflag.ExitOnError)
 	klog.InitFlags(klogFlagSet)
+	// Opt into the new klog behavior so that -stderrthreshold is honored even
+	// when -logtostderr=true (the default).
+	// Ref: kubernetes/klog#212, kubernetes/klog#432
+	_ = klogFlagSet.Set("legacy_stderr_threshold_behavior", "false")
+	_ = klogFlagSet.Set("stderrthreshold", "INFO")
 	flag.CommandLine.AddGoFlag(klogFlagSet.Lookup("v"))
 
 	flag.CommandLine.AddGoFlagSet(goflag.CommandLine)
diff --git a/dev/tasks/main.go b/dev/tasks/main.go
index ec175b805cf..0246b1a651a 100644
--- a/dev/tasks/main.go
+++ b/dev/tasks/main.go
@@ -58,6 +58,11 @@ func run(ctx context.Context) error {
 	addVPrefix := false
 	flag.BoolVar(&addVPrefix, "add-v-prefix", addVPrefix, "prefix tag with 'v'")
 	klog.InitFlags(nil)
+	// Opt into the new klog behavior so that -stderrthreshold is honored even
+	// when -logtostderr=true (the default).
+	// Ref: kubernetes/klog#212, kubernetes/klog#432
+	flag.Set("legacy_stderr_threshold_behavior", "false") //nolint:errcheck
+	flag.Set("stderrthreshold", "INFO")                   //nolint:errcheck
 	flag.Parse()
 
 	if branch == "" {
diff --git a/dev/tools/controllerbuilder/cmd/benchmark/type/main.go b/dev/tools/controllerbuilder/cmd/benchmark/type/main.go
index ed8f935ad85..e12718e95a5 100644
--- a/dev/tools/controllerbuilder/cmd/benchmark/type/main.go
+++ b/dev/tools/controllerbuilder/cmd/benchmark/type/main.go
@@ -46,6 +46,11 @@ func run(ctx context.Context) error {
 	var o Options
 
 	klog.InitFlags(nil)
+	// Opt into the new klog behavior so that -stderrthreshold is honored even
+	// when -logtostderr=true (the default).
+	// Ref: kubernetes/klog#212, kubernetes/klog#432
+	flag.Set("legacy_stderr_threshold_behavior", "false") //nolint:errcheck
+	flag.Set("stderrthreshold", "INFO")                   //nolint:errcheck
 
 	flag.StringVar(&o.predictPath, "predict-path", o.predictPath, "the path to the bash script where the prediction job is run.")
 	flag.StringVar(&o.BaseDir, "base-dir", o.BaseDir, "base directory for the project code")
diff --git a/dev/tools/controllerbuilder/cmd/codebot/main.go b/dev/tools/controllerbuilder/cmd/codebot/main.go
index df9c3f32bdd..4176407d7ae 100644
--- a/dev/tools/controllerbuilder/cmd/codebot/main.go
+++ b/dev/tools/controllerbuilder/cmd/codebot/main.go
@@ -68,6 +68,11 @@ func (cb *CodeBot) run(ctx context.Context) error {
 	o.InitDefaults()
 
 	klog.InitFlags(nil)
+	// Opt into the new klog behavior so that -stderrthreshold is honored even
+	// when -logtostderr=true (the default).
+	// Ref: kubernetes/klog#212, kubernetes/klog#432
+	flag.Set("legacy_stderr_threshold_behavior", "false") //nolint:errcheck
+	flag.Set("stderrthreshold", "INFO")                   //nolint:errcheck
 
 	flag.StringVar(&o.ProtoDir, "proto-dir", o.ProtoDir, "base directory for checkout of proto API definitions")
 	flag.StringVar(&o.BaseDir, "base-dir", o.BaseDir, "base directory for the project code")
diff --git a/dev/tools/controllerbuilder/cmd/ctf/main.go b/dev/tools/controllerbuilder/cmd/ctf/main.go
index 1bae1380ce1..fe91c1d8d5e 100644
--- a/dev/tools/controllerbuilder/cmd/ctf/main.go
+++ b/dev/tools/controllerbuilder/cmd/ctf/main.go
@@ -49,6 +49,11 @@ func run(ctx context.Context) error {
 	options.AddFlags(flag.CommandLine)
 
 	klog.InitFlags(nil)
+	// Opt into the new klog behavior so that -stderrthreshold is honored even
+	// when -logtostderr=true (the default).
+	// Ref: kubernetes/klog#212, kubernetes/klog#432
+	flag.Set("legacy_stderr_threshold_behavior", "false") //nolint:errcheck
+	flag.Set("stderrthreshold", "INFO")                   //nolint:errcheck
 	flag.Parse()
 
 	if scenario == "" {
diff --git a/dev/tools/controllerbuilder/go.mod b/dev/tools/controllerbuilder/go.mod
index 8e98957e07c..284872d29ff 100644
--- a/dev/tools/controllerbuilder/go.mod
+++ b/dev/tools/controllerbuilder/go.mod
@@ -20,7 +20,7 @@ require (
 	gopkg.in/yaml.v3 v3.0.1
 	k8s.io/apimachinery v0.34.2
 	k8s.io/klog v1.0.0
-	k8s.io/klog/v2 v2.130.1
+	k8s.io/klog/v2 v2.140.0
 	sigs.k8s.io/yaml v1.6.0
 )
 
diff --git a/dev/tools/controllerbuilder/go.sum b/dev/tools/controllerbuilder/go.sum
index 4c8aac4f2ef..73c5998fec2 100644
--- a/dev/tools/controllerbuilder/go.sum
+++ b/dev/tools/controllerbuilder/go.sum
@@ -335,7 +335,7 @@ k8s.io/apimachinery v0.34.2 h1:zQ12Uk3eMHPxrsbUJgNF8bTauTVR2WgqJsTmwTE/NW4=
 k8s.io/apimachinery v0.34.2/go.mod h1:/GwIlEcWuTX9zKIg2mbw0LRFIsXwrfoVxn+ef0X13lw=
 k8s.io/klog v1.0.0 h1:Pt+yjF5aB1xDSVbau4VsWe+dQNzA0qv1LlXdC2dF6Q8=
 k8s.io/klog v1.0.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
-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=
 sigs.k8s.io/yaml v1.6.0 h1:G8fkbMSAFqgEFgh4b1wmtzDnioxFCUgTZhlbj5P9QYs=
 sigs.k8s.io/yaml v1.6.0/go.mod h1:796bPqUfzR/0jLAl6XjHl3Ck7MiyVv8dbTdyT3/pMf4=
diff --git a/experiments/tools/licensescan/go.mod b/experiments/tools/licensescan/go.mod
index ea303e8708c..61fb4d01119 100644
--- a/experiments/tools/licensescan/go.mod
+++ b/experiments/tools/licensescan/go.mod
@@ -7,7 +7,7 @@ toolchain go1.26.1
 require (
 	github.com/spf13/cobra v1.8.1
 	golang.org/x/mod v0.33.0
-	k8s.io/klog/v2 v2.130.1
+	k8s.io/klog/v2 v2.140.0
 	sigs.k8s.io/yaml v1.4.0
 )
 
diff --git a/experiments/tools/licensescan/go.sum b/experiments/tools/licensescan/go.sum
index c95399a1a7b..894e7700846 100644
--- a/experiments/tools/licensescan/go.sum
+++ b/experiments/tools/licensescan/go.sum
@@ -15,7 +15,7 @@ golang.org/x/mod v0.33.0/go.mod h1:swjeQEj+6r7fODbD2cqrnje9PnziFuw4bmLbBZFrQ5w=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-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=
 sigs.k8s.io/yaml v1.4.0 h1:Mk1wCc2gy/F0THH0TAp1QYyJNzRm2KCLy3o5ASXVI5E=
 sigs.k8s.io/yaml v1.4.0/go.mod h1:Ejl7/uTz7PSA4eKMyQCUTnhZYNmLIl+5c2lQPGR2BPY=
diff --git a/experiments/tools/licensescan/main.go b/experiments/tools/licensescan/main.go
index f25d5bf9e14..17c61f9545b 100644
--- a/experiments/tools/licensescan/main.go
+++ b/experiments/tools/licensescan/main.go
@@ -21,6 +21,7 @@ import (
 	"debug/buildinfo"
 	"embed"
 	"encoding/json"
+	"flag"
 	"fmt"
 	"io"
 	"io/fs"
@@ -59,6 +60,11 @@ func buildRootCommand() *cobra.Command {
 	cmd.AddCommand(buildLicenseGenerateCommand())
 
 	klog.InitFlags(nil)
+	// Opt into the new klog behavior so that -stderrthreshold is honored even
+	// when -logtostderr=true (the default).
+	// Ref: kubernetes/klog#212, kubernetes/klog#432
+	flag.Set("legacy_stderr_threshold_behavior", "false") //nolint:errcheck
+	flag.Set("stderrthreshold", "INFO")                   //nolint:errcheck
 
 	return cmd
 }
diff --git a/go.mod b/go.mod
index 2a09007ea28..050fe4ff2c0 100644
--- a/go.mod
+++ b/go.mod
@@ -130,7 +130,7 @@ require (
 	k8s.io/apiextensions-apiserver v0.33.10
 	k8s.io/apimachinery v0.33.10
 	k8s.io/client-go v0.33.10
-	k8s.io/klog/v2 v2.130.1
+	k8s.io/klog/v2 v2.140.0
 	sigs.k8s.io/controller-runtime v0.20.4
 	sigs.k8s.io/controller-tools v0.16.5
 	sigs.k8s.io/kubebuilder-declarative-pattern v0.20.0-beta.1.0.20250514194322-871029137730
@@ -333,7 +333,7 @@ replace (
 	k8s.io/client-go => k8s.io/client-go v0.33.10
 	k8s.io/code-generator => k8s.io/code-generator v0.33.10
 	k8s.io/component-base => k8s.io/component-base v0.33.10
-	k8s.io/klog/v2 => k8s.io/klog/v2 v2.130.1
+	k8s.io/klog/v2 => k8s.io/klog/v2 v2.140.0
 	k8s.io/kube-openapi => k8s.io/kube-openapi v0.0.0-20250318190949-c8a335a9a2ff
 	k8s.io/kubectl => k8s.io/kubectl v0.32.1
 	sigs.k8s.io/yaml => sigs.k8s.io/yaml v1.4.0
diff --git a/go.sum b/go.sum
index a0ae7c582fd..90bbaed1baf 100644
--- a/go.sum
+++ b/go.sum
@@ -3782,8 +3782,8 @@ k8s.io/component-base v0.33.10/go.mod h1:SXzog0UR4MeP6ZwZFdt7g64X83BS+brXdDHQ6m4
 k8s.io/gengo/v2 v2.0.0-20240826214909-a7b603a56eb7/go.mod h1:EJykeLsmFC60UQbYJezXkEsG2FLrt0GPNkU5iK5GWxU=
 k8s.io/gengo/v2 v2.0.0-20250207200755-1244d31929d7/go.mod h1:EJykeLsmFC60UQbYJezXkEsG2FLrt0GPNkU5iK5GWxU=
 k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
-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 v0.33.10/go.mod h1:C1I8mjFFBNzfUZXYt9FZVJ8MJl7ynFbGgZFbBzkBJ3E=
 k8s.io/kube-openapi v0.0.0-20250318190949-c8a335a9a2ff h1:/usPimJzUKKu+m+TE36gUyGcf03XZEP0ZIKgKj35LS4=
 k8s.io/kube-openapi v0.0.0-20250318190949-c8a335a9a2ff/go.mod h1:5jIi+8yX4RIb8wk3XwBo5Pq2ccx4FP10ohkbSKCZoK8=
diff --git a/mockgcp/go.mod b/mockgcp/go.mod
index 7da0042b8a7..1533ee18c0c 100644
--- a/mockgcp/go.mod
+++ b/mockgcp/go.mod
@@ -52,7 +52,7 @@ require (
 	google.golang.org/protobuf v1.36.11
 	k8s.io/api v0.33.10
 	k8s.io/apimachinery v0.33.10
-	k8s.io/klog/v2 v2.130.1
+	k8s.io/klog/v2 v2.140.0
 	sigs.k8s.io/controller-runtime v0.20.4
 	sigs.k8s.io/yaml v1.6.0
 )
diff --git a/mockgcp/go.sum b/mockgcp/go.sum
index 3a8276d6954..bb4bde30684 100644
--- a/mockgcp/go.sum
+++ b/mockgcp/go.sum
@@ -279,8 +279,8 @@ github.com/go-git/go-billy/v5 v5.8.0 h1:I8hjc3LbBlXTtVuFNJuwYuMiHvQJDq1AT6u4DwDz
 github.com/go-git/go-billy/v5 v5.8.0/go.mod h1:RpvI/rw4Vr5QA+Z60c6d6LXH0rYJo0uD5SqfmrrheCY=
 github.com/go-git/go-git-fixtures/v4 v4.2.1/go.mod h1:K8zd3kDUAykwTdDCr+I0per6Y6vMiRR/nnVTBtavnB0=
 github.com/go-git/go-git/v5 v5.4.2/go.mod h1:gQ1kArt6d+n+BGd+/B/I74HwRTLhth2+zti4ihgckDc=
-github.com/go-git/go-git/v5 v5.17.1 h1:WnljyxIzSj9BRRUlnmAU35ohDsjRK0EKmL0evDqi5Jk=
-github.com/go-git/go-git/v5 v5.17.1/go.mod h1:pW/VmeqkanRFqR6AljLcs7EA7FbZaN5MQqO7oZADXpo=
+github.com/go-git/go-git/v5 v5.18.0 h1:O831KI+0PR51hM2kep6T8k+w0/LIAD490gvqMCvL5hM=
+github.com/go-git/go-git/v5 v5.18.0/go.mod h1:pW/VmeqkanRFqR6AljLcs7EA7FbZaN5MQqO7oZADXpo=
 github.com/go-jose/go-jose/v4 v4.1.4 h1:moDMcTHmvE6Groj34emNPLs/qtYXRVcd6S7NHbHz3kA=
 github.com/go-jose/go-jose/v4 v4.1.4/go.mod h1:x4oUasVrzR7071A4TnHLGSPpNOm2a21K9Kf04k1rs08=
 github.com/go-kit/log v0.1.0/go.mod h1:zbhenjAZHb184qTLMA9ZjW7ThYL0H2mk7Q6pNt4vbaY=
@@ -494,8 +494,8 @@ github.com/mitchellh/mapstructure v1.5.0 h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyua
 github.com/mitchellh/mapstructure v1.5.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
 github.com/mitchellh/reflectwalk v1.0.2 h1:G2LzWKi524PWgd3mLHV8Y5k7s6XUvT0Gef6zxSIeXaQ=
 github.com/mitchellh/reflectwalk v1.0.2/go.mod h1:mSTlrgnPZtwu0c4WaC2kGObEpuNDbx0jmZXqmk4esnw=
-github.com/moby/spdystream v0.5.0 h1:7r0J1Si3QO/kjRitvSLVVFUjxMEb/YLj6S9FF62JBCU=
-github.com/moby/spdystream v0.5.0/go.mod h1:xBAYlnt/ay+11ShkdFKNAG7LsyK/tmNBVvVOwrfMgdI=
+github.com/moby/spdystream v0.5.1 h1:9sNYeYZUcci9R6/w7KDaFWEWeV4LStVG78Mpyq/Zm/Y=
+github.com/moby/spdystream v0.5.1/go.mod h1:xBAYlnt/ay+11ShkdFKNAG7LsyK/tmNBVvVOwrfMgdI=
 github.com/moby/term v0.5.0 h1:xt8Q1nalod/v7BqbG21f8mQPqH+xAaC9C3N3wfWbVP0=
 github.com/moby/term v0.5.0/go.mod h1:8FzsFHVUBGZdbDsJw/ot+X+d5HLUbvklYLJ9uGfcI3Y=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
@@ -861,8 +861,8 @@ k8s.io/client-go v0.33.10 h1:Q3KkTB0zPnGlrs6mS2p6LaJ2zM5ehBVz0JO9ZKQied0=
 k8s.io/client-go v0.33.10/go.mod h1:pEg4JnHgHR+m6tZ23SUWj+md2iPdszmVG8KD9/pHtec=
 k8s.io/component-base v0.33.10 h1:lqF51ldyCT3723fwmFZ3B/GLEY4s33VBjrw2GOGyfIA=
 k8s.io/component-base v0.33.10/go.mod h1:SXzog0UR4MeP6ZwZFdt7g64X83BS+brXdDHQ6m4Tnd0=
-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/kube-openapi v0.0.0-20250318190949-c8a335a9a2ff h1:/usPimJzUKKu+m+TE36gUyGcf03XZEP0ZIKgKj35LS4=
 k8s.io/kube-openapi v0.0.0-20250318190949-c8a335a9a2ff/go.mod h1:5jIi+8yX4RIb8wk3XwBo5Pq2ccx4FP10ohkbSKCZoK8=
 k8s.io/kubectl v0.32.1 h1:/btLtXLQUU1rWx8AEvX9jrb9LaI6yeezt3sFALhB8M8=
diff --git a/mockgcp/tools/gapic/main.go b/mockgcp/tools/gapic/main.go
index 0adbb02db46..0d27c79e60b 100644
--- a/mockgcp/tools/gapic/main.go
+++ b/mockgcp/tools/gapic/main.go
@@ -41,6 +41,11 @@ func main() {
 
 func run(ctx context.Context) error {
 	klog.InitFlags(nil)
+	// Opt into the new klog behavior so that -stderrthreshold is honored even
+	// when -logtostderr=true (the default).
+	// Ref: kubernetes/klog#212, kubernetes/klog#432
+	flag.Set("legacy_stderr_threshold_behavior", "false") //nolint:errcheck
+	flag.Set("stderrthreshold", "INFO")                   //nolint:errcheck
 
 	var opt protogen.ConvertOptions
 	opt.NormalizeLRO = true
diff --git a/pkg/cli/cmd/preview/execute.go b/pkg/cli/cmd/preview/execute.go
index 5f17c522f9b..cd0793969ba 100644
--- a/pkg/cli/cmd/preview/execute.go
+++ b/pkg/cli/cmd/preview/execute.go
@@ -41,6 +41,11 @@ func Execute(ctx context.Context, opts *Options) error {
 	// Use a custom FlagSet for klog to avoid conflicts with global flag.CommandLine
 	klogFlags := flag.NewFlagSet("klog", flag.ExitOnError)
 	klog.InitFlags(klogFlags)
+	// Opt into the new klog behavior so that -stderrthreshold is honored even
+	// when -logtostderr=true (the default).
+	// Ref: kubernetes/klog#212, kubernetes/klog#432
+	_ = klogFlags.Set("legacy_stderr_threshold_behavior", "false")
+	_ = klogFlags.Set("stderrthreshold", "INFO")
 	if err := klogFlags.Set("v", fmt.Sprintf("%d", opts.Verbose)); err != nil {
 		fmt.Printf("Failed to set -v flag: %v\n", err)
 	}
diff --git a/pkg/test/main/testmain.go b/pkg/test/main/testmain.go
index 66047e1c0c3..00d153b38ce 100644
--- a/pkg/test/main/testmain.go
+++ b/pkg/test/main/testmain.go
@@ -51,6 +51,11 @@ func ForIntegrationTests(m *testing.M, mgr *manager.Manager) {
 
 	klogFlags := flag.NewFlagSet("klog", flag.ExitOnError)
 	klog.InitFlags(klogFlags)
+	// Opt into the new klog behavior so that -stderrthreshold is honored even
+	// when -logtostderr=true (the default).
+	// Ref: kubernetes/klog#212, kubernetes/klog#432
+	_ = klogFlags.Set("legacy_stderr_threshold_behavior", "false")
+	_ = klogFlags.Set("stderrthreshold", "INFO")
 
 	// Sync the log and klog flags.
 	flag.CommandLine.VisitAll(func(f1 *flag.Flag) {