diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index d7ebdbfdb..5fd269dae 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -1,16 +1,20 @@
 version: 2
 updates:
-    # Maintain dependencies for GitHub Actions.
-    - package-ecosystem: "github-actions"
-      directory: "/"
-      schedule:
-          interval: "daily"
-      # Too noisy. See https://github.community/t/increase-if-necessary-for-github-actions-in-dependabot/179581
-      open-pull-requests-limit: 0
+  # Maintain dependencies for GitHub Actions.
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    cooldown:
+      default-days: 7
+    ignore:
+      - dependency-name: "yiisoft/*"
 
-    # Maintain dependencies for Composer
-    - package-ecosystem: "composer"
-      directory: "/"
-      schedule:
-          interval: "daily"
-      versioning-strategy: increase-if-necessary
+  # Maintain dependencies for Composer
+  - package-ecosystem: "composer"
+    directory: "/"
+    schedule:
+        interval: "daily"
+    versioning-strategy: increase-if-necessary
+    cooldown:
+      default-days: 7
diff --git a/.github/workflows/composer-require-checker.yml b/.github/workflows/composer-require-checker.yml
index 5455811ee..4dcc19e19 100644
--- a/.github/workflows/composer-require-checker.yml
+++ b/.github/workflows/composer-require-checker.yml
@@ -16,6 +16,8 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
 jobs:
   composer-require-checker:
     uses: yiisoft/actions/.github/workflows/composer-require-checker.yml@master
diff --git a/.github/workflows/db-mssql.yml b/.github/workflows/db-mssql.yml
index 0050a3eee..95f8afcb7 100644
--- a/.github/workflows/db-mssql.yml
+++ b/.github/workflows/db-mssql.yml
@@ -22,6 +22,8 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
 jobs:
   build:
     name: PHP ${{ matrix.php }}
@@ -43,7 +45,7 @@ jobs:
 
     services:
       mssql:
-          image: mcr.microsoft.com/mssql/server:2022-latest
+          image: mcr.microsoft.com/mssql/server:2022-latest@sha256:e07b9699a2b749969f19d86563ceeea22bd3a69f7f1db85a8d1ac4bdaf0c6f56
           env:
               SA_PASSWORD: YourStrong!Passw0rd
               ACCEPT_EULA: Y
@@ -61,13 +63,15 @@ jobs:
           sudo ACCEPT_EULA=Y apt-get install -y msodbcsql18
 
       - name: Checkout.
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        with:
+          persist-credentials: false
 
       - name: Create MS SQL Database
         run: docker exec -i mssql /opt/mssql-tools18/bin/sqlcmd -C -S localhost -U SA -P 'YourStrong!Passw0rd' -Q 'CREATE DATABASE [ar-test]'
 
       - name: Install PHP with extensions.
-        uses: shivammathur/setup-php@v2
+        uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # v2
         with:
           php-version: ${{ matrix.php }}
           extensions: ${{ env.extensions }}
@@ -87,7 +91,7 @@ jobs:
         run: vendor/bin/phpunit --testsuite=Mssql --coverage-clover=coverage.xml --colors=always --display-warnings --display-deprecations
 
       - name: Upload coverage to Codecov.
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@0fb7174895f61a3b6b78fc075e0cd60383518dac # v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ./coverage.xml
diff --git a/.github/workflows/db-mysql.yml b/.github/workflows/db-mysql.yml
index 3426142de..19342f989 100644
--- a/.github/workflows/db-mysql.yml
+++ b/.github/workflows/db-mysql.yml
@@ -22,6 +22,8 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
 jobs:
   build:
     name: PHP ${{ matrix.php }}
@@ -43,7 +45,7 @@ jobs:
 
     services:
       mysql:
-        image: mysql:latest
+        image: mysql:9@sha256:55e529b57e06b3da98df40600de2245a0ab4bb4b979e3ead4339349b0b50bf4a
         env:
           MYSQL_ALLOW_EMPTY_PASSWORD: true
           MYSQL_DATABASE: ar-test
@@ -55,10 +57,12 @@ jobs:
 
     steps:
       - name: Checkout.
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        with:
+          persist-credentials: false
 
       - name: Install PHP with extensions.
-        uses: shivammathur/setup-php@v2
+        uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # v2
         with:
           php-version: ${{ matrix.php }}
           extensions: ${{ env.extensions }}
@@ -78,7 +82,7 @@ jobs:
         run: vendor/bin/phpunit --testsuite=Mysql --coverage-clover=coverage.xml --colors=always --display-warnings --display-deprecations
 
       - name: Upload coverage to Codecov.
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@0fb7174895f61a3b6b78fc075e0cd60383518dac # v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ./coverage.xml
diff --git a/.github/workflows/db-oracle.yml b/.github/workflows/db-oracle.yml
index d548168ab..7a129cfbf 100644
--- a/.github/workflows/db-oracle.yml
+++ b/.github/workflows/db-oracle.yml
@@ -22,6 +22,8 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
 jobs:
   build:
     name: PHP ${{ matrix.php }}
@@ -43,7 +45,7 @@ jobs:
 
     services:
       oci:
-        image: gvenzl/oracle-xe:latest
+        image: gvenzl/oracle-xe:21@sha256:c2682a4216b0fe65537912c4a049c7e5c15a85bb7c94bb8137d5f2d2eef60603
         ports:
           - 1521:1521
         env:
@@ -63,10 +65,12 @@ jobs:
         run: docker exec -i oci bash -c "sqlplus -s system/root@XE <<< 'ALTER USER system DEFAULT TABLESPACE USERS;'"
 
       - name: Checkout.
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        with:
+          persist-credentials: false
 
       - name: Install PHP with extensions.
-        uses: shivammathur/setup-php@v2
+        uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # v2
         with:
           php-version: ${{ matrix.php }}
           extensions: ${{ env.extensions }}
@@ -86,7 +90,7 @@ jobs:
         run: vendor/bin/phpunit --testsuite=Oracle --coverage-clover=coverage.xml --colors=always --display-warnings --display-deprecations
 
       - name: Upload coverage to Codecov.
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@0fb7174895f61a3b6b78fc075e0cd60383518dac # v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ./coverage.xml
diff --git a/.github/workflows/db-pgsql.yml b/.github/workflows/db-pgsql.yml
index 02b28d480..c379c175a 100644
--- a/.github/workflows/db-pgsql.yml
+++ b/.github/workflows/db-pgsql.yml
@@ -22,6 +22,8 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
 jobs:
   build:
     name: PHP ${{ matrix.php }}
@@ -42,7 +44,7 @@ jobs:
 
     services:
       postgres:
-        image: postgres:18
+        image: postgres:18@sha256:8d526a5b3f29da6d7835ebdab8e3393958e09608e21fd848c32b9187b4a1e1ce
         env:
           POSTGRES_DB: ar-test
           POSTGRES_USER: yii
@@ -53,10 +55,12 @@ jobs:
 
     steps:
       - name: Checkout.
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        with:
+          persist-credentials: false
 
       - name: Install PHP with extensions.
-        uses: shivammathur/setup-php@v2
+        uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # v2
         with:
           php-version: ${{ matrix.php }}
           extensions: ${{ env.extensions }}
@@ -76,7 +80,7 @@ jobs:
         run: vendor/bin/phpunit --testsuite=Pgsql --coverage-clover=coverage.xml --colors=always --display-warnings --display-deprecations
 
       - name: Upload coverage to Codecov.
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@ab904c41d6ece82784817410c45d8b8c02684457 # v3.1.6
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ./coverage.xml
diff --git a/.github/workflows/db-sqlite.yml b/.github/workflows/db-sqlite.yml
index bd0b4722c..4c51a8206 100644
--- a/.github/workflows/db-sqlite.yml
+++ b/.github/workflows/db-sqlite.yml
@@ -22,6 +22,8 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
 jobs:
   build:
     name: PHP ${{ matrix.php }}-sqlite-${{ matrix.os }}
@@ -47,10 +49,12 @@ jobs:
 
     steps:
       - name: Checkout.
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        with:
+          persist-credentials: false
 
       - name: Install PHP with extensions.
-        uses: shivammathur/setup-php@v2
+        uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # v2
         with:
           php-version: ${{ matrix.php }}
           extensions: ${{ env.extensions }}
@@ -70,7 +74,7 @@ jobs:
         run: vendor/bin/phpunit --testsuite=Sqlite --coverage-clover=coverage.xml --colors=always --display-warnings --display-deprecations
 
       - name: Upload coverage to Codecov.
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@0fb7174895f61a3b6b78fc075e0cd60383518dac # v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ./coverage.xml
diff --git a/.github/workflows/mutation.yml b/.github/workflows/mutation.yml
index 6912041ba..33a9ad8de 100644
--- a/.github/workflows/mutation.yml
+++ b/.github/workflows/mutation.yml
@@ -18,6 +18,8 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
 jobs:
   mutation:
     name: PHP ${{ matrix.php }}-${{ matrix.os }}
@@ -36,7 +38,7 @@ jobs:
 
     services:
       postgres:
-        image: postgres:18
+        image: postgres:18@sha256:8d526a5b3f29da6d7835ebdab8e3393958e09608e21fd848c32b9187b4a1e1ce
         env:
           POSTGRES_DB: ar-test
           POSTGRES_USER: yii
@@ -47,10 +49,12 @@ jobs:
 
     steps:
       - name: Checkout.
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        with:
+          persist-credentials: false
 
       - name: Install PHP with extensions.
-        uses: shivammathur/setup-php@v2
+        uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # v2
         with:
           php-version: ${{ matrix.php }}
           extensions: ${{ env.extensions }}
@@ -61,7 +65,7 @@ jobs:
         run: composer remove --dev yiisoft/db-sqlite yiisoft/db-mysql yiisoft/db-mssql yiisoft/db-oracle
 
       - name: Install Composer dependencies
-        uses: ramsey/composer-install@v3
+        uses: ramsey/composer-install@a8d0d959dab41457692a5e2041bd9b757a119e3f # 3.2.1
 
       - name: Install required yiisoft/db and yiisoft/db-pgsql
         uses: yiisoft/actions/install-packages@master
diff --git a/.github/workflows/rector-cs.yml b/.github/workflows/rector-cs.yml
index 1bff7b99d..3f04c69fa 100644
--- a/.github/workflows/rector-cs.yml
+++ b/.github/workflows/rector-cs.yml
@@ -12,7 +12,7 @@ on:
       - '.php-cs-fixer.dist.php'
 
 permissions:
-  contents: write
+  contents: read
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -21,6 +21,8 @@ concurrency:
 jobs:
   rector:
     uses: yiisoft/actions/.github/workflows/rector-cs.yml@master
+    permissions:
+      contents: write # Required by the reusable workflow to commit Rector and PHP CS Fixer changes.
     with:
       php: '8.1'
       required-packages: >-
diff --git a/.github/workflows/static.yml b/.github/workflows/static.yml
index 2041ed935..64f73a00f 100644
--- a/.github/workflows/static.yml
+++ b/.github/workflows/static.yml
@@ -17,6 +17,8 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
 jobs:
   psalm:
     uses: yiisoft/actions/.github/workflows/psalm.yml@master
diff --git a/.github/workflows/update-readme-packages.yml b/.github/workflows/update-readme-packages.yml
index ec988be9d..f4e13aab0 100644
--- a/.github/workflows/update-readme-packages.yml
+++ b/.github/workflows/update-readme-packages.yml
@@ -1,7 +1,7 @@
 name: Update README packages
 
 on:
-  pull_request_target:
+  pull_request:
     paths:
       - '.github/workflows/update-readme-packages.yml'
       - 'composer.json'
diff --git a/.github/workflows/zizmor.yml b/.github/workflows/zizmor.yml
new file mode 100644
index 000000000..430255de4
--- /dev/null
+++ b/.github/workflows/zizmor.yml
@@ -0,0 +1,22 @@
+name: GitHub Actions Security Analysis with zizmor 🌈
+
+on:
+  push:
+    branches:
+      - master
+      - main
+    paths:
+      - '.github/**.yml'
+      - '.github/**.yaml'
+  pull_request:
+    paths:
+      - '.github/**.yml'
+      - '.github/**.yaml'
+
+permissions:
+  actions: read # Required by zizmor when reading workflow metadata through the API.
+  contents: read # Required to read workflow files.
+
+jobs:
+  zizmor:
+    uses: yiisoft/actions/.github/workflows/zizmor.yml@master