diff --git a/api/go.mod b/api/go.mod
index b320e1102..4f30a7623 100644
--- a/api/go.mod
+++ b/api/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/api
 
-go 1.25.0
+go 1.26.0
 
 require (
 	github.com/blang/semver/v4 v4.0.0
diff --git a/cmd/config/docs/api-conventions/functions-impl.md b/cmd/config/docs/api-conventions/functions-impl.md
index dfccf0f2b..31cde3432 100644
--- a/cmd/config/docs/api-conventions/functions-impl.md
+++ b/cmd/config/docs/api-conventions/functions-impl.md
@@ -90,7 +90,7 @@ End-of-message
 image.
 
 ```
-FROM public.ecr.aws/docker/library/golang:1.25.7
+FROM public.ecr.aws/docker/library/golang:1.26.5
 RUN go get sigs.k8s.io/kustomize/cmd/config
 RUN mv /go/bin/config /usr/bin/config
 COPY nginx-template.sh /usr/bin/nginx-template.sh
diff --git a/cmd/config/go.mod b/cmd/config/go.mod
index 2888600d4..4aab33cd5 100644
--- a/cmd/config/go.mod
+++ b/cmd/config/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/cmd/config
 
-go 1.25.0
+go 1.26.0
 
 require (
 	github.com/go-errors/errors v1.4.2
diff --git a/cmd/config/internal/commands/e2e/e2econtainerconfig/Dockerfile b/cmd/config/internal/commands/e2e/e2econtainerconfig/Dockerfile
index ee46e97ed..56edaf2bc 100644
--- a/cmd/config/internal/commands/e2e/e2econtainerconfig/Dockerfile
+++ b/cmd/config/internal/commands/e2e/e2econtainerconfig/Dockerfile
@@ -1,7 +1,7 @@
 # Copyright 2019 The Kubernetes Authors.
 # SPDX-License-Identifier: Apache-2.0
 
-FROM public.ecr.aws/docker/library/golang:1.25.7
+FROM public.ecr.aws/docker/library/golang:1.26.5
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 
diff --git a/cmd/config/internal/commands/e2e/e2econtainerconfig/go.mod b/cmd/config/internal/commands/e2e/e2econtainerconfig/go.mod
index 802e2c309..4ecda459a 100644
--- a/cmd/config/internal/commands/e2e/e2econtainerconfig/go.mod
+++ b/cmd/config/internal/commands/e2e/e2econtainerconfig/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/cmd/config/internal/commands/e2e/e2econtainerconfig
 
-go 1.25.0
+go 1.26.0
 
 require sigs.k8s.io/kustomize/kyaml v0.14.2
 
diff --git a/cmd/config/internal/commands/e2e/e2econtainerenvgenerator/Dockerfile b/cmd/config/internal/commands/e2e/e2econtainerenvgenerator/Dockerfile
index 38eb0dd03..aceefef1f 100644
--- a/cmd/config/internal/commands/e2e/e2econtainerenvgenerator/Dockerfile
+++ b/cmd/config/internal/commands/e2e/e2econtainerenvgenerator/Dockerfile
@@ -1,7 +1,7 @@
 # Copyright 2019 The Kubernetes Authors.
 # SPDX-License-Identifier: Apache-2.0
 
-FROM public.ecr.aws/docker/library/golang:1.25.7
+FROM public.ecr.aws/docker/library/golang:1.26.5
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 
diff --git a/cmd/config/internal/commands/e2e/e2econtainerenvgenerator/go.mod b/cmd/config/internal/commands/e2e/e2econtainerenvgenerator/go.mod
index 80b16c63c..94828a33e 100644
--- a/cmd/config/internal/commands/e2e/e2econtainerenvgenerator/go.mod
+++ b/cmd/config/internal/commands/e2e/e2econtainerenvgenerator/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/cmd/config/internal/commands/e2e/e2econtainerenvgenerator
 
-go 1.25.0
+go 1.26.0
 
 require sigs.k8s.io/kustomize/kyaml v0.14.2
 
diff --git a/cmd/config/internal/commands/e2e/e2econtainermountbind/Dockerfile b/cmd/config/internal/commands/e2e/e2econtainermountbind/Dockerfile
index 084865a4f..47db21fde 100644
--- a/cmd/config/internal/commands/e2e/e2econtainermountbind/Dockerfile
+++ b/cmd/config/internal/commands/e2e/e2econtainermountbind/Dockerfile
@@ -1,7 +1,7 @@
 # Copyright 2019 The Kubernetes Authors.
 # SPDX-License-Identifier: Apache-2.0
 
-FROM public.ecr.aws/docker/library/golang:1.25.7
+FROM public.ecr.aws/docker/library/golang:1.26.5
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 
diff --git a/cmd/config/internal/commands/e2e/e2econtainermountbind/go.mod b/cmd/config/internal/commands/e2e/e2econtainermountbind/go.mod
index 46136316c..a92337403 100644
--- a/cmd/config/internal/commands/e2e/e2econtainermountbind/go.mod
+++ b/cmd/config/internal/commands/e2e/e2econtainermountbind/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/cmd/config/internal/commands/e2e/e2econtainer-render-helm-chart
 
-go 1.25.0
+go 1.26.0
 
 require sigs.k8s.io/kustomize/kyaml v0.14.2
 
diff --git a/cmd/config/internal/commands/e2e/e2econtainersimplegenerator/Dockerfile b/cmd/config/internal/commands/e2e/e2econtainersimplegenerator/Dockerfile
index a16f5c32d..9069cc7e9 100644
--- a/cmd/config/internal/commands/e2e/e2econtainersimplegenerator/Dockerfile
+++ b/cmd/config/internal/commands/e2e/e2econtainersimplegenerator/Dockerfile
@@ -1,7 +1,7 @@
 # Copyright 2019 The Kubernetes Authors.
 # SPDX-License-Identifier: Apache-2.0
 
-FROM public.ecr.aws/docker/library/golang:1.25.7
+FROM public.ecr.aws/docker/library/golang:1.26.5
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 
diff --git a/cmd/config/internal/commands/e2e/e2econtainersimplegenerator/go.mod b/cmd/config/internal/commands/e2e/e2econtainersimplegenerator/go.mod
index e09fb45ce..db41be432 100644
--- a/cmd/config/internal/commands/e2e/e2econtainersimplegenerator/go.mod
+++ b/cmd/config/internal/commands/e2e/e2econtainersimplegenerator/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/cmd/config/internal/commands/e2e/e2econtainersimplegenerator
 
-go 1.25.0
+go 1.26.0
 
 require sigs.k8s.io/kustomize/kyaml v0.14.2
 
diff --git a/cmd/config/internal/generateddocs/api/docs.go b/cmd/config/internal/generateddocs/api/docs.go
index 665f44180..df10e5610 100644
--- a/cmd/config/internal/generateddocs/api/docs.go
+++ b/cmd/config/internal/generateddocs/api/docs.go
@@ -144,7 +144,7 @@ The script wraps itself using ` + "`" + `config run wrap -- $0` + "`" + ` which
 
 ` + "`" + `Dockerfile` + "`" + ` installs ` + "`" + `kustomize fn` + "`" + ` and copies the script into the container image.
 
-	FROM public.ecr.aws/docker/library/golang:1.25.7
+	FROM public.ecr.aws/docker/library/golang:1.26.5
 	RUN go get sigs.k8s.io/kustomize/cmd/config
 	RUN mv /go/bin/config /usr/bin/config
 	COPY nginx-template.sh /usr/bin/nginx-template.sh
diff --git a/cmd/depprobcheck/go.mod b/cmd/depprobcheck/go.mod
index baf6c2e8f..ca9178fae 100644
--- a/cmd/depprobcheck/go.mod
+++ b/cmd/depprobcheck/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/cmd/depprobcheck
 
-go 1.25.0
+go 1.26.0
 
 require (
 	k8s.io/cli-runtime v0.20.4
diff --git a/cmd/gorepomod/go.mod b/cmd/gorepomod/go.mod
index c157a3ec5..775ec6ca4 100644
--- a/cmd/gorepomod/go.mod
+++ b/cmd/gorepomod/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/cmd/gorepomod
 
-go 1.25.0
+go 1.26.0
 
 tool sigs.k8s.io/kustomize/cmd/gorepomod
 
diff --git a/cmd/k8scopy/go.mod b/cmd/k8scopy/go.mod
index 0714054aa..2fc7d8940 100644
--- a/cmd/k8scopy/go.mod
+++ b/cmd/k8scopy/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/cmd/k8scopy
 
-go 1.25.0
+go 1.26.0
 
 tool sigs.k8s.io/kustomize/cmd/k8scopy
 
diff --git a/cmd/mdtogo/go.mod b/cmd/mdtogo/go.mod
index 49ad57b66..8cf134d0e 100644
--- a/cmd/mdtogo/go.mod
+++ b/cmd/mdtogo/go.mod
@@ -1,5 +1,5 @@
 module sigs.k8s.io/kustomize/cmd/mdtogo
 
-go 1.25.0
+go 1.26.0
 
 tool sigs.k8s.io/kustomize/cmd/mdtogo
diff --git a/cmd/pluginator/go.mod b/cmd/pluginator/go.mod
index 6b416bfa9..e4883c68b 100644
--- a/cmd/pluginator/go.mod
+++ b/cmd/pluginator/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/cmd/pluginator/v2
 
-go 1.25.0
+go 1.26.0
 
 tool sigs.k8s.io/kustomize/cmd/pluginator/v2
 
diff --git a/cmd/pluginator/internal/krmfunction/converter.go b/cmd/pluginator/internal/krmfunction/converter.go
index 54c8e606c..fd9383c19 100644
--- a/cmd/pluginator/internal/krmfunction/converter.go
+++ b/cmd/pluginator/internal/krmfunction/converter.go
@@ -86,7 +86,7 @@ func (c *Converter) Convert() error {
 }
 
 func (c *Converter) getDockerfile() string {
-	return `FROM public.ecr.aws/docker/library/golang:1.25.7
+	return `FROM public.ecr.aws/docker/library/golang:1.26.5
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 COPY . .
diff --git a/cmd/pluginator/internal/krmfunction/funcwrappersrc/go.mod.src b/cmd/pluginator/internal/krmfunction/funcwrappersrc/go.mod.src
index 507c9dcc1..e78995da8 100644
--- a/cmd/pluginator/internal/krmfunction/funcwrappersrc/go.mod.src
+++ b/cmd/pluginator/internal/krmfunction/funcwrappersrc/go.mod.src
@@ -1,6 +1,6 @@
 module main
 
-go 1.25
+go 1.26.0
 
 require (
 	github.com/spf13/cobra v1.4.0
diff --git a/functions/examples/application-cr/image/Dockerfile b/functions/examples/application-cr/image/Dockerfile
index 3dd6d4430..9d2745c06 100644
--- a/functions/examples/application-cr/image/Dockerfile
+++ b/functions/examples/application-cr/image/Dockerfile
@@ -1,7 +1,7 @@
 # Copyright 2019 The Kubernetes Authors.
 # SPDX-License-Identifier: Apache-2.0
 
-FROM public.ecr.aws/docker/library/golang:1.25.7
+FROM public.ecr.aws/docker/library/golang:1.26.5
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 COPY go.mod .
diff --git a/functions/examples/application-cr/image/go.mod b/functions/examples/application-cr/image/go.mod
index 69b1e49b9..a869ccb14 100644
--- a/functions/examples/application-cr/image/go.mod
+++ b/functions/examples/application-cr/image/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/functions/examples/application-cr
 
-go 1.25.0
+go 1.26.0
 
 require (
 	k8s.io/apimachinery v0.29.0
diff --git a/functions/examples/fn-framework-application/go.mod b/functions/examples/fn-framework-application/go.mod
index 070097630..10fc9e63f 100644
--- a/functions/examples/fn-framework-application/go.mod
+++ b/functions/examples/fn-framework-application/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/functions/examples/fn-framework-application
 
-go 1.25.0
+go 1.26.0
 
 require (
 	github.com/spf13/cobra v1.10.2
diff --git a/functions/examples/injection-tshirt-sizes/image/Dockerfile b/functions/examples/injection-tshirt-sizes/image/Dockerfile
index 3dd6d4430..9d2745c06 100644
--- a/functions/examples/injection-tshirt-sizes/image/Dockerfile
+++ b/functions/examples/injection-tshirt-sizes/image/Dockerfile
@@ -1,7 +1,7 @@
 # Copyright 2019 The Kubernetes Authors.
 # SPDX-License-Identifier: Apache-2.0
 
-FROM public.ecr.aws/docker/library/golang:1.25.7
+FROM public.ecr.aws/docker/library/golang:1.26.5
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 COPY go.mod .
diff --git a/functions/examples/injection-tshirt-sizes/image/go.mod b/functions/examples/injection-tshirt-sizes/image/go.mod
index 79ceafa05..3317c9bd5 100644
--- a/functions/examples/injection-tshirt-sizes/image/go.mod
+++ b/functions/examples/injection-tshirt-sizes/image/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/functions/examples/injection-tshirt-sizes
 
-go 1.25.0
+go 1.26.0
 
 require sigs.k8s.io/kustomize/kyaml v0.13.7
 
diff --git a/functions/examples/template-go-nginx/image/Dockerfile b/functions/examples/template-go-nginx/image/Dockerfile
index 3dd6d4430..9d2745c06 100644
--- a/functions/examples/template-go-nginx/image/Dockerfile
+++ b/functions/examples/template-go-nginx/image/Dockerfile
@@ -1,7 +1,7 @@
 # Copyright 2019 The Kubernetes Authors.
 # SPDX-License-Identifier: Apache-2.0
 
-FROM public.ecr.aws/docker/library/golang:1.25.7
+FROM public.ecr.aws/docker/library/golang:1.26.5
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 COPY go.mod .
diff --git a/functions/examples/template-go-nginx/image/go.mod b/functions/examples/template-go-nginx/image/go.mod
index 5a8285a44..fb587f6a6 100644
--- a/functions/examples/template-go-nginx/image/go.mod
+++ b/functions/examples/template-go-nginx/image/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/functions/examples/template-go-nginx
 
-go 1.25.0
+go 1.26.0
 
 require sigs.k8s.io/kustomize/kyaml v0.13.7
 
diff --git a/functions/examples/validator-kubeval/image/Dockerfile b/functions/examples/validator-kubeval/image/Dockerfile
index ae2dab54e..48b9e2df2 100644
--- a/functions/examples/validator-kubeval/image/Dockerfile
+++ b/functions/examples/validator-kubeval/image/Dockerfile
@@ -5,7 +5,7 @@ FROM alpine:latest as schemas
 RUN apk --no-cache add git
 RUN git clone --depth 1 https://github.com/instrumenta/kubernetes-json-schema.git
 
-FROM public.ecr.aws/docker/library/golang:1.25.7 as function
+FROM public.ecr.aws/docker/library/golang:1.26.5 as function
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 COPY go.mod .
diff --git a/functions/examples/validator-kubeval/image/go.mod b/functions/examples/validator-kubeval/image/go.mod
index ede7f343d..d67278f2e 100644
--- a/functions/examples/validator-kubeval/image/go.mod
+++ b/functions/examples/validator-kubeval/image/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/functions/examples/validator-kubeval
 
-go 1.25.0
+go 1.26.0
 
 require (
 	github.com/instrumenta/kubeval v0.16.1
diff --git a/functions/examples/validator-resource-requests/image/Dockerfile b/functions/examples/validator-resource-requests/image/Dockerfile
index 3dd6d4430..9d2745c06 100644
--- a/functions/examples/validator-resource-requests/image/Dockerfile
+++ b/functions/examples/validator-resource-requests/image/Dockerfile
@@ -1,7 +1,7 @@
 # Copyright 2019 The Kubernetes Authors.
 # SPDX-License-Identifier: Apache-2.0
 
-FROM public.ecr.aws/docker/library/golang:1.25.7
+FROM public.ecr.aws/docker/library/golang:1.26.5
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 COPY go.mod .
diff --git a/functions/examples/validator-resource-requests/image/go.mod b/functions/examples/validator-resource-requests/image/go.mod
index 60fe869ce..c6786ded6 100644
--- a/functions/examples/validator-resource-requests/image/go.mod
+++ b/functions/examples/validator-resource-requests/image/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/functions/examples/validator-resource-requests
 
-go 1.25.0
+go 1.26.0
 
 require sigs.k8s.io/kustomize/kyaml v0.13.7
 
diff --git a/go.work b/go.work
index 880b741bd..772ee0985 100644
--- a/go.work
+++ b/go.work
@@ -1,7 +1,7 @@
 // Use the minimum patch version to avoid an extra bump in downstream projects.
-go 1.25.0
+go 1.26.0
 
-toolchain go1.25.8
+toolchain go1.26.5
 
 use (
 	./api
diff --git a/hack/go.mod b/hack/go.mod
index ff195d296..4dddef0be 100644
--- a/hack/go.mod
+++ b/hack/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/hack
 
-go 1.25.0
+go 1.26.0
 
 tool (
 	// for embeding code and manifest into markdown docs
diff --git a/kustomize.Dockerfile b/kustomize.Dockerfile
index 9c4f3c0dc..a77f2457a 100644
--- a/kustomize.Dockerfile
+++ b/kustomize.Dockerfile
@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 # build
-FROM public.ecr.aws/docker/library/golang:1.25.7 AS builder
+FROM public.ecr.aws/docker/library/golang:1.26.5 AS builder
 ARG VERSION
 ARG DATE
 RUN mkdir /build
diff --git a/kustomize/go.mod b/kustomize/go.mod
index 0f5467729..f91312ef5 100644
--- a/kustomize/go.mod
+++ b/kustomize/go.mod
@@ -1,7 +1,7 @@
 module sigs.k8s.io/kustomize/kustomize/v5
 
 // Omit the patch version to avoid an extra bump in downstream projects.
-go 1.25.0
+go 1.26.0
 
 require (
 	github.com/google/go-cmp v0.7.0
diff --git a/kyaml/fn/framework/command/command.go b/kyaml/fn/framework/command/command.go
index d2d507d1d..c377a41cb 100644
--- a/kyaml/fn/framework/command/command.go
+++ b/kyaml/fn/framework/command/command.go
@@ -121,7 +121,7 @@ func AddGenerateDockerfile(cmd *cobra.Command) {
 		Use:  "gen [DIR]",
 		Args: cobra.ExactArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) error {
-			if err := os.WriteFile(filepath.Join(args[0], "Dockerfile"), []byte(`FROM public.ecr.aws/docker/library/golang:1.25.7 as builder
+			if err := os.WriteFile(filepath.Join(args[0], "Dockerfile"), []byte(`FROM public.ecr.aws/docker/library/golang:1.26.5 as builder
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 COPY go.mod go.sum ./
diff --git a/kyaml/fn/framework/command/command_test.go b/kyaml/fn/framework/command/command_test.go
index 5ca787a3d..57c616490 100644
--- a/kyaml/fn/framework/command/command_test.go
+++ b/kyaml/fn/framework/command/command_test.go
@@ -41,7 +41,7 @@ func TestCommand_dockerfile(t *testing.T) {
 		t.FailNow()
 	}
 
-	expected := `FROM public.ecr.aws/docker/library/golang:1.25.7 as builder
+	expected := `FROM public.ecr.aws/docker/library/golang:1.26.5 as builder
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 COPY go.mod go.sum ./
diff --git a/kyaml/fn/framework/example/Dockerfile b/kyaml/fn/framework/example/Dockerfile
index 7f33e7641..6fe362fc5 100644
--- a/kyaml/fn/framework/example/Dockerfile
+++ b/kyaml/fn/framework/example/Dockerfile
@@ -1,7 +1,7 @@
 # Copyright 2019 The Kubernetes Authors.
 # SPDX-License-Identifier: Apache-2.0
 
-FROM public.ecr.aws/docker/library/golang:1.25.7
+FROM public.ecr.aws/docker/library/golang:1.26.5
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 COPY . .
diff --git a/kyaml/go.mod b/kyaml/go.mod
index c7d02e7b6..5f5e82eaa 100644
--- a/kyaml/go.mod
+++ b/kyaml/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/kyaml
 
-go 1.25.0
+go 1.26.0
 
 require (
 	github.com/go-errors/errors v1.4.2
diff --git a/kyaml/yaml/rnode.go b/kyaml/yaml/rnode.go
index 43cad97e5..bb929059f 100644
--- a/kyaml/yaml/rnode.go
+++ b/kyaml/yaml/rnode.go
@@ -1065,7 +1065,7 @@ func deAnchor(yn *yaml.Node) (res *yaml.Node, err error) {
 		}
 		return yn, nil
 	default:
-		return nil, fmt.Errorf("cannot deAnchor kind %q", yn.Kind)
+		return nil, fmt.Errorf("cannot deAnchor kind %d", yn.Kind)
 	}
 }
 
diff --git a/plugin/builtin/annotationstransformer/go.mod b/plugin/builtin/annotationstransformer/go.mod
index 41ef59326..5a767532f 100644
--- a/plugin/builtin/annotationstransformer/go.mod
+++ b/plugin/builtin/annotationstransformer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/annotationstransformer
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/builtin/configmapgenerator/go.mod b/plugin/builtin/configmapgenerator/go.mod
index 92e6cefd4..97d336ad9 100644
--- a/plugin/builtin/configmapgenerator/go.mod
+++ b/plugin/builtin/configmapgenerator/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/configmapgenerator
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/builtin/hashtransformer/go.mod b/plugin/builtin/hashtransformer/go.mod
index 14e4ade8b..fb33e0b02 100644
--- a/plugin/builtin/hashtransformer/go.mod
+++ b/plugin/builtin/hashtransformer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/hashtransformer
 
-go 1.25.0
+go 1.26.0
 
 require sigs.k8s.io/kustomize/api v0.21.1
 
diff --git a/plugin/builtin/helmchartinflationgenerator/go.mod b/plugin/builtin/helmchartinflationgenerator/go.mod
index 671a0e762..69e4e9ba3 100644
--- a/plugin/builtin/helmchartinflationgenerator/go.mod
+++ b/plugin/builtin/helmchartinflationgenerator/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/helmchartinflationgenerator
 
-go 1.25.0
+go 1.26.0
 
 require (
 	github.com/stretchr/testify v1.11.1
diff --git a/plugin/builtin/iampolicygenerator/go.mod b/plugin/builtin/iampolicygenerator/go.mod
index deb32b7b3..899b70827 100644
--- a/plugin/builtin/iampolicygenerator/go.mod
+++ b/plugin/builtin/iampolicygenerator/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/iampolicygenerator
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/builtin/imagetagtransformer/go.mod b/plugin/builtin/imagetagtransformer/go.mod
index 6830dbaf6..44eb75db6 100644
--- a/plugin/builtin/imagetagtransformer/go.mod
+++ b/plugin/builtin/imagetagtransformer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/imagetagtransformer
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/builtin/labeltransformer/go.mod b/plugin/builtin/labeltransformer/go.mod
index a8df1c963..ed662edfc 100644
--- a/plugin/builtin/labeltransformer/go.mod
+++ b/plugin/builtin/labeltransformer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/labeltransformer
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/builtin/namespacetransformer/go.mod b/plugin/builtin/namespacetransformer/go.mod
index e6657afe1..37ea3d7db 100644
--- a/plugin/builtin/namespacetransformer/go.mod
+++ b/plugin/builtin/namespacetransformer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/namespacetransformer
 
-go 1.25.0
+go 1.26.0
 
 require (
 	github.com/stretchr/testify v1.11.1
diff --git a/plugin/builtin/patchjson6902transformer/go.mod b/plugin/builtin/patchjson6902transformer/go.mod
index 09c59c99d..872dadaad 100644
--- a/plugin/builtin/patchjson6902transformer/go.mod
+++ b/plugin/builtin/patchjson6902transformer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/patchjson6902transformer
 
-go 1.25.0
+go 1.26.0
 
 require (
 	gopkg.in/evanphx/json-patch.v4 v4.13.0
diff --git a/plugin/builtin/patchstrategicmergetransformer/go.mod b/plugin/builtin/patchstrategicmergetransformer/go.mod
index 588138a0c..55859b9e4 100644
--- a/plugin/builtin/patchstrategicmergetransformer/go.mod
+++ b/plugin/builtin/patchstrategicmergetransformer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/patchstrategicmergetransformer
 
-go 1.25.0
+go 1.26.0
 
 require (
 	github.com/stretchr/testify v1.11.1
diff --git a/plugin/builtin/patchtransformer/go.mod b/plugin/builtin/patchtransformer/go.mod
index 71868627c..0239dbbbd 100644
--- a/plugin/builtin/patchtransformer/go.mod
+++ b/plugin/builtin/patchtransformer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/patchtransformer
 
-go 1.25.0
+go 1.26.0
 
 require (
 	github.com/stretchr/testify v1.11.1
diff --git a/plugin/builtin/prefixtransformer/go.mod b/plugin/builtin/prefixtransformer/go.mod
index 0648ffadc..080330943 100644
--- a/plugin/builtin/prefixtransformer/go.mod
+++ b/plugin/builtin/prefixtransformer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/prefixtransformer
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/builtin/replacementtransformer/go.mod b/plugin/builtin/replacementtransformer/go.mod
index 597605a36..7c8ca5b5e 100644
--- a/plugin/builtin/replacementtransformer/go.mod
+++ b/plugin/builtin/replacementtransformer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/replacementtransformer
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/builtin/replicacounttransformer/go.mod b/plugin/builtin/replicacounttransformer/go.mod
index f847be55d..7b255184e 100644
--- a/plugin/builtin/replicacounttransformer/go.mod
+++ b/plugin/builtin/replicacounttransformer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/replicacounttransformer
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/builtin/secretgenerator/go.mod b/plugin/builtin/secretgenerator/go.mod
index 643b31001..931f182a5 100644
--- a/plugin/builtin/secretgenerator/go.mod
+++ b/plugin/builtin/secretgenerator/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/secretgenerator
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/builtin/sortordertransformer/go.mod b/plugin/builtin/sortordertransformer/go.mod
index b395fcc68..217256fea 100644
--- a/plugin/builtin/sortordertransformer/go.mod
+++ b/plugin/builtin/sortordertransformer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/sortordertransformer
 
-go 1.25.0
+go 1.26.0
 
 require (
 	github.com/stretchr/testify v1.11.1
diff --git a/plugin/builtin/suffixtransformer/go.mod b/plugin/builtin/suffixtransformer/go.mod
index b21efdaff..8233161e3 100644
--- a/plugin/builtin/suffixtransformer/go.mod
+++ b/plugin/builtin/suffixtransformer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/suffixtransformer
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/builtin/valueaddtransformer/go.mod b/plugin/builtin/valueaddtransformer/go.mod
index 47734018e..8f1c96219 100644
--- a/plugin/builtin/valueaddtransformer/go.mod
+++ b/plugin/builtin/valueaddtransformer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/builtin/valueaddtransformer
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/someteam.example.com/v1/bashedconfigmap/go.mod b/plugin/someteam.example.com/v1/bashedconfigmap/go.mod
index eaadc70bd..47c638d2d 100644
--- a/plugin/someteam.example.com/v1/bashedconfigmap/go.mod
+++ b/plugin/someteam.example.com/v1/bashedconfigmap/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/someteam.example.com/v1/bashedconfigmap
 
-go 1.25.0
+go 1.26.0
 
 require sigs.k8s.io/kustomize/api v0.21.1
 
diff --git a/plugin/someteam.example.com/v1/calvinduplicator/go.mod b/plugin/someteam.example.com/v1/calvinduplicator/go.mod
index 5474e11f8..0f70946e2 100644
--- a/plugin/someteam.example.com/v1/calvinduplicator/go.mod
+++ b/plugin/someteam.example.com/v1/calvinduplicator/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/someteam.example.com/v1/calvinduplicator
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/someteam.example.com/v1/dateprefixer/go.mod b/plugin/someteam.example.com/v1/dateprefixer/go.mod
index 3a5913fe5..59d621373 100644
--- a/plugin/someteam.example.com/v1/dateprefixer/go.mod
+++ b/plugin/someteam.example.com/v1/dateprefixer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/someteam.example.com/v1/dateprefixer
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/someteam.example.com/v1/printpluginenv/go.mod b/plugin/someteam.example.com/v1/printpluginenv/go.mod
index 72fdf19a2..2a9875a31 100644
--- a/plugin/someteam.example.com/v1/printpluginenv/go.mod
+++ b/plugin/someteam.example.com/v1/printpluginenv/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/someteam.example.com/v1/printpluginenv
 
-go 1.25.0
+go 1.26.0
 
 require sigs.k8s.io/kustomize/api v0.21.1
 
diff --git a/plugin/someteam.example.com/v1/secretsfromdatabase/go.mod b/plugin/someteam.example.com/v1/secretsfromdatabase/go.mod
index ac58424f9..d1577c07e 100644
--- a/plugin/someteam.example.com/v1/secretsfromdatabase/go.mod
+++ b/plugin/someteam.example.com/v1/secretsfromdatabase/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/someteam.example.com/v1/secretsfromdatabase
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/someteam.example.com/v1/sedtransformer/go.mod b/plugin/someteam.example.com/v1/sedtransformer/go.mod
index 1d59c36a3..b9f5b34c2 100644
--- a/plugin/someteam.example.com/v1/sedtransformer/go.mod
+++ b/plugin/someteam.example.com/v1/sedtransformer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/someteam.example.com/v1/sedtransformer
 
-go 1.25.0
+go 1.26.0
 
 require sigs.k8s.io/kustomize/api v0.21.1
 
diff --git a/plugin/someteam.example.com/v1/someservicegenerator/go.mod b/plugin/someteam.example.com/v1/someservicegenerator/go.mod
index 59feb1c05..4009d50b7 100644
--- a/plugin/someteam.example.com/v1/someservicegenerator/go.mod
+++ b/plugin/someteam.example.com/v1/someservicegenerator/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/someteam.example.com/v1/someservicegenerator
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/someteam.example.com/v1/stringprefixer/go.mod b/plugin/someteam.example.com/v1/stringprefixer/go.mod
index 234d384f7..d21affd64 100644
--- a/plugin/someteam.example.com/v1/stringprefixer/go.mod
+++ b/plugin/someteam.example.com/v1/stringprefixer/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/someteam.example.com/v1/stringprefixer
 
-go 1.25.0
+go 1.26.0
 
 require (
 	sigs.k8s.io/kustomize/api v0.21.1
diff --git a/plugin/someteam.example.com/v1/validator/go.mod b/plugin/someteam.example.com/v1/validator/go.mod
index 2ed959abd..e6c7467db 100644
--- a/plugin/someteam.example.com/v1/validator/go.mod
+++ b/plugin/someteam.example.com/v1/validator/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/someteam.example.com/v1/validator
 
-go 1.25.0
+go 1.26.0
 
 require sigs.k8s.io/kustomize/api v0.21.1
 
diff --git a/plugin/untested/v1/gogetter/go.mod b/plugin/untested/v1/gogetter/go.mod
index 87ef3dc29..f6891eade 100644
--- a/plugin/untested/v1/gogetter/go.mod
+++ b/plugin/untested/v1/gogetter/go.mod
@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/plugin/untested/v1/gogetter
 
-go 1.25.0
+go 1.26.0
 
 require sigs.k8s.io/kustomize/api v0.21.1
 
diff --git a/site/Dockerfile b/site/Dockerfile
index 3c69e9ca9..99826d4d4 100644
--- a/site/Dockerfile
+++ b/site/Dockerfile
@@ -3,7 +3,7 @@
 # This Dockerfile is based on:
 # (https://github.com/kubernetes/website/blob/main/Dockerfile)
 
-FROM docker.io/library/golang:1.25.7-alpine
+FROM docker.io/library/golang:1.26.5-alpine
 
 RUN apk add --no-cache \
     curl \
@@ -19,7 +19,7 @@ COPY hack/go.mod ./
 COPY hack/go.sum ./
 RUN go install --tags extended github.com/gohugoio/hugo
 
-FROM docker.io/library/golang:1.25.7-alpine
+FROM docker.io/library/golang:1.26.5-alpine
 
 RUN apk add --no-cache \
     runuser \