diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
index c90e0af9..bb8e51f5 100644
--- a/.github/workflows/integration.yml
+++ b/.github/workflows/integration.yml
@@ -8,19 +8,21 @@ on:
 
 jobs:
   integration:
+    name: integration (${{ matrix.node-version.label }})
 
     runs-on: ubuntu-latest
 
     strategy:
       matrix:
-        node-version: [22.x]
+        node-version:
+          - { label: '22.x', version: '22.23.4' }
 
     steps:
     - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
     - run: openssl req -x509 -nodes -newkey rsa -keyout ./test/certs/server-key.pem -out ./test/certs/server-cert.pem -days 1 -subj "/C=CL/ST=RM/L=OpenTelemetryTest/O=Root/OU=Test/CN=ca"
-    - name: Use Node.js ${{ matrix.node-version }}
+    - name: Use Node.js ${{ matrix.node-version.version }}
       uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
       with:
-        node-version: ${{ matrix.node-version }}
+        node-version: ${{ matrix.node-version.version }}
     - run: npm i
     - run: npm run functionaltest
diff --git a/.github/workflows/node.js-linux-arm64.yml b/.github/workflows/node.js-linux-arm64.yml
index 50103cc0..48d9fefe 100644
--- a/.github/workflows/node.js-linux-arm64.yml
+++ b/.github/workflows/node.js-linux-arm64.yml
@@ -8,11 +8,15 @@ on:
 
 jobs:
   build:
+    name: build (${{ matrix.node-version.label }})
     runs-on: ubuntu-24.04-arm
 
     strategy:
       matrix:
-        node-version: [22.x, 24.x]
+        node-version:
+          - { label: '22.x', version: '22.23.4' }
+          - { label: '24.x', version: '24.22.1' }
+          - { label: '26.x', version: '26.12.1' }
 
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
@@ -22,10 +26,10 @@ jobs:
           mkdir -p ./test/certs
           openssl req -x509 -nodes -newkey rsa:2048 -keyout ./test/certs/server-key.pem -out ./test/certs/server-cert.pem -days 1 -subj "/C=CL/ST=RM/L=OpenTelemetryTest/O=Root/OU=Test/CN=ca"
 
-      - name: Use Node.js ${{ matrix.node-version }}
+      - name: Use Node.js ${{ matrix.node-version.version }}
         uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: ${{ matrix.node-version.version }}
 
       - run: npm run clean
       - run: npm i
diff --git a/.github/workflows/node.js-windows.yml b/.github/workflows/node.js-windows.yml
index facc6b53..ccf44330 100644
--- a/.github/workflows/node.js-windows.yml
+++ b/.github/workflows/node.js-windows.yml
@@ -8,12 +8,16 @@ on:
 
 jobs:
   build:
+    name: build (${{ matrix.node-version.label }})
 
     runs-on: windows-latest
 
     strategy:
       matrix:
-        node-version: [22.x, 24.x]
+        node-version:
+          - { label: '22.x', version: '22.23.4' }
+          - { label: '24.x', version: '24.22.1' }
+          - { label: '26.x', version: '26.12.1' }
 
     steps:
     - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
@@ -38,10 +42,10 @@ jobs:
         $randomKeyContent = [Convert]::ToBase64String($randomBytes)
         Set-Content -Path "$certsDir\server-key.pem" -Value "-----BEGIN PRIVATE KEY-----`r`n$randomKeyContent`r`n-----END PRIVATE KEY-----"
 
-    - name: Use Node.js ${{ matrix.node-version }}
+    - name: Use Node.js ${{ matrix.node-version.version }}
       uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
       with:
-        node-version: ${{ matrix.node-version }}
+        node-version: ${{ matrix.node-version.version }}
 
     - run: npm run clean
     - name: Install dependencies
diff --git a/.github/workflows/node.js.yml b/.github/workflows/node.js.yml
index 011adcd6..5ab500bc 100644
--- a/.github/workflows/node.js.yml
+++ b/.github/workflows/node.js.yml
@@ -8,21 +8,25 @@ on:
 
 jobs:
   build:
+    name: build (${{ matrix.os }}, ${{ matrix.node-version.label }})
 
     runs-on: ${{ matrix.os }}
 
     strategy:
       matrix:
         os: [ubuntu-latest]
-        node-version: [22.x, 24.x]
+        node-version:
+          - { label: '22.x', version: '22.23.4' }
+          - { label: '24.x', version: '24.22.1' }
+          - { label: '26.x', version: '26.12.1' }
 
     steps:
     - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
     - run: openssl req -x509 -nodes -newkey rsa -keyout ./test/certs/server-key.pem -out ./test/certs/server-cert.pem -days 1 -subj "/C=CL/ST=RM/L=OpenTelemetryTest/O=Root/OU=Test/CN=ca"
-    - name: (${{ matrix.os }}) on Node.js ${{ matrix.node-version }}
+    - name: (${{ matrix.os }}) on Node.js ${{ matrix.node-version.version }}
       uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
       with:
-        node-version: ${{ matrix.node-version }}
+        node-version: ${{ matrix.node-version.version }}
     - run: npm run clean
     - run: npm i
     - run: npm run build --if-present
diff --git a/.github/workflows/npm-publish.yml b/.github/workflows/npm-publish.yml
index c24fe3c8..c2a78d0e 100644
--- a/.github/workflows/npm-publish.yml
+++ b/.github/workflows/npm-publish.yml
@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
-          node-version: 22
+          node-version: '22.23.4'
       - run: npm ci
       - run: npm test
 
@@ -27,7 +27,7 @@ jobs:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
-          node-version: 22
+          node-version: '22.23.4'
           registry-url: https://registry.npmjs.org/
       - run: npm i
       - run: npm publish
diff --git a/.github/workflows/performance-comment.yml b/.github/workflows/performance-comment.yml
index 6503acfe..a00f9d9b 100644
--- a/.github/workflows/performance-comment.yml
+++ b/.github/workflows/performance-comment.yml
@@ -43,7 +43,7 @@ jobs:
 
       - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
-          node-version: '22.x'
+          node-version: '22.23.4'
 
       - name: Download perf-results artifact
         id: download
diff --git a/.github/workflows/performance.yml b/.github/workflows/performance.yml
index 4b34b352..e9a79451 100644
--- a/.github/workflows/performance.yml
+++ b/.github/workflows/performance.yml
@@ -20,7 +20,7 @@ jobs:
     # scenarios * (warmup + samples * duration + per-child init).
     timeout-minutes: 40
     env:
-      NODE_VERSION: '22.x'
+      NODE_VERSION: '22.23.4'
       PERF_SAMPLES: '3'
       PERF_DURATION: '5'
       PERF_WARMUP: '1'
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8d5bda4f..a5957a0c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+- Require Node.js 22.23.4+, 24.22.1+, or 26.12.1+ within those release lines and update CI for the full October 21, 2026 security release, including precautionary compression-encoding coverage. Upgrade deployed runtimes separately; installing the SDK does not update Node.js.
+
 ### 3.17.0 (2026-10-06)
 
 #### Breaking Changes
diff --git a/package-lock.json b/package-lock.json
index 885f1602..c7df6e0e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -49,7 +49,7 @@
         "typescript": "~5.4.0"
       },
       "engines": {
-        "node": ">=22.0.0"
+        "node": "^22.23.4 || ^24.22.1 || ^26.12.1"
       }
     },
     "node_modules/@azure-rest/core-client": {
diff --git a/package.json b/package.json
index 65da79a8..4022419b 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "backcompattest": "npm run build && npm pack && node --use_strict ./test/backCompatibility/runBackCompatTests.js"
   },
   "engines": {
-    "node": ">=22.0.0"
+    "node": "^22.23.4 || ^24.22.1 || ^26.12.1"
   },
   "devDependencies": {
     "@types/long": "^4.0.2",
diff --git a/test/functionalTests/runner/package.json b/test/functionalTests/runner/package.json
index d289bd99..e90267b5 100644
--- a/test/functionalTests/runner/package.json
+++ b/test/functionalTests/runner/package.json
@@ -3,6 +3,9 @@
   "version": "1.0.0",
   "description": "",
   "private": true,
+  "engines": {
+    "node": "^22.23.4 || ^24.22.1 || ^26.12.1"
+  },
   "main": "Main.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
diff --git a/test/functionalTests/testApp/package.json b/test/functionalTests/testApp/package.json
index 6fedc37e..4ca9866d 100644
--- a/test/functionalTests/testApp/package.json
+++ b/test/functionalTests/testApp/package.json
@@ -2,6 +2,9 @@
   "name": "ainodejs-functionaltests-testapp",
   "version": "1.0.0",
   "description": "",
+  "engines": {
+    "node": "^22.23.4 || ^24.22.1 || ^26.12.1"
+  },
   "main": "Main.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
diff --git a/test/performanceTests/package-lock.json b/test/performanceTests/package-lock.json
index 878a5283..dfb9335d 100644
--- a/test/performanceTests/package-lock.json
+++ b/test/performanceTests/package-lock.json
@@ -23,6 +23,9 @@
         "eslint": "^8.0.0",
         "rimraf": "^5.0.5",
         "typescript": "~5.3.3"
+      },
+      "engines": {
+        "node": "^22.23.4 || ^24.22.1 || ^26.12.1"
       }
     },
     "node_modules/@azure-rest/core-client": {
diff --git a/test/performanceTests/package.json b/test/performanceTests/package.json
index 4101ca35..343a5a7f 100644
--- a/test/performanceTests/package.json
+++ b/test/performanceTests/package.json
@@ -25,6 +25,9 @@
     "typescript": "~5.3.3"
   },
   "private": true,
+  "engines": {
+    "node": "^22.23.4 || ^24.22.1 || ^26.12.1"
+  },
   "scripts": {
     "perf-test:node": "npm run build && node dist-esm/index.spec.js",
     "perf:benchmark": "npm run build && node runBenchmarks.mjs",