diff --git a/.github/workflows/check-licenses.yml b/.github/workflows/check-licenses.yml
index a904b2562..28852f836 100644
--- a/.github/workflows/check-licenses.yml
+++ b/.github/workflows/check-licenses.yml
@@ -17,7 +17,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@main
         with:
-          go-version: 1.21.1
+          go-version: 1.21.3
         id: go
       - name: Code checkout
         uses: actions/checkout@master
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 4e2e66be2..ab7e324a1 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -57,7 +57,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: 1.21.1
+          go-version: 1.21.3
           check-latest: true
           cache: true
         if: ${{ matrix.language == 'go' }}
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 945b46ae0..a0d88242b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -32,7 +32,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v4
         with:
-          go-version: 1.21.1
+          go-version: 1.21.3
           check-latest: true
           cache: true
 
@@ -56,7 +56,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v4
         with:
-          go-version: 1.21.1
+          go-version: 1.21.3
           check-latest: true
           cache: true
 
@@ -81,7 +81,7 @@ jobs:
         id: go
         uses: actions/setup-go@v4
         with:
-          go-version: 1.21.1
+          go-version: 1.21.3
           check-latest: true
           cache: true
 
diff --git a/app/vmui/Dockerfile-web b/app/vmui/Dockerfile-web
index 6c5663ede..687a3cc6a 100644
--- a/app/vmui/Dockerfile-web
+++ b/app/vmui/Dockerfile-web
@@ -1,4 +1,4 @@
-FROM golang:1.21.1 as build-web-stage
+FROM golang:1.21.3 as build-web-stage
 COPY build /build
 
 WORKDIR /build
diff --git a/deployment/docker/Makefile b/deployment/docker/Makefile
index d90a2a2ad..8b79334ae 100644
--- a/deployment/docker/Makefile
+++ b/deployment/docker/Makefile
@@ -5,7 +5,7 @@ DOCKER_NAMESPACE ?= victoriametrics
 ROOT_IMAGE ?= alpine:3.18.4
 CERTS_IMAGE := alpine:3.18.4
 
-GO_BUILDER_IMAGE := golang:1.21.1-alpine
+GO_BUILDER_IMAGE := golang:1.21.3-alpine
 BUILDER_IMAGE := local/builder:2.0.0-$(shell echo $(GO_BUILDER_IMAGE) | tr :/ __)-1
 BASE_IMAGE := local/base:1.1.4-$(shell echo $(ROOT_IMAGE) | tr :/ __)-$(shell echo $(CERTS_IMAGE) | tr :/ __)
 DOCKER_BUILD ?= docker build
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 642313856..24ffa0f98 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -30,6 +30,8 @@ The sandbox cluster installation is running under the constant load generated by
 
 **vmalert's cmd-line flag `datasource.queryTimeAlignment` was deprecated and will have no effect anymore. It will be completely removed in next releases. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5049) and more detailed changes below.**
 
+* SECURITY: upgrade Go builder from Go1.21.1 to Go1.21.3. See [the list of issues addressed in Go1.21.2](https://github.com/golang/go/issues?q=milestone%3AGo1.21.2+label%3ACherryPickApproved) and [the list of issues addressed in Go1.21.3](https://github.com/golang/go/issues?q=milestone%3AGo1.21.3+label%3ACherryPickApproved).
+
 * FEATURE: [vmalert](https://docs.victoriametrics.com/vmalert.html): add `eval_alignment` attribute for [Groups](https://docs.victoriametrics.com/vmalert.html#groups), it will align group query requests timestamp with interval like `datasource.queryTimeAlignment` did.
   This also means that `datasource.queryTimeAlignment` command-line flag becomes deprecated now and will have no effect if configured. If `datasource.queryTimeAlignment` was set to `false` before, then `eval_alignment` has to be set to `false` explicitly under group.
   See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5049).
diff --git a/snap/local/Makefile b/snap/local/Makefile
index 3bc0c93a9..a1600157c 100644
--- a/snap/local/Makefile
+++ b/snap/local/Makefile
@@ -1,4 +1,4 @@
-GO_VERSION ?=1.21.1
+GO_VERSION ?=1.21.3
 SNAP_BUILDER_IMAGE := local/snap-builder:2.0.0-$(shell echo $(GO_VERSION) | tr :/ __)