fix: sichere Brotli-Laufzeit ab und erhöhe Patchversionen

backend/.nvmrc

@@ -0,0 +1 @@
+24.22.1

backend/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "backend",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "backend",
-      "version": "1.0.0",
+      "version": "1.0.1",
       "hasInstallScript": true,
       "license": "ISC",
       "dependencies": {
@@ -37,6 +37,9 @@
         "cross-env": "^7.0.3",
         "nodemon": "^3.1.4",
         "vue-eslint-parser": "9.4.3"
+      },
+      "engines": {
+        "node": "^22.23.4 || ^24.22.1 || ^26.12.1"
       }
     },
     "node_modules/@babel/runtime": {

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "backend",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "main": "server.js",
   "type": "module",
   "scripts": {
@@ -42,5 +42,8 @@
     "cross-env": "^7.0.3",
     "nodemon": "^3.1.4",
     "vue-eslint-parser": "9.4.3"
+  },
+  "engines": {
+    "node": "^22.23.4 || ^24.22.1 || ^26.12.1"
   }
 }

backend/scripts/require-safe-node.cjs

@@ -0,0 +1,22 @@
+// CVE-2026-111497: Node's bundled Brotli decoder must include the security fix.
+// Check Node versions: patched releases can still report Brotli 1.2.0.
+// https://nodejs.org/en/blog/vulnerability/october-2026-security-releases
+'use strict';
+
+function requireSafeNode() {
+  const [major, minor, patch] = process.versions.node.split('.').map(Number);
+  const minimum = { 22: [23, 4], 24: [22, 1], 26: [12, 1] }[major];
+  const patched = minimum && (minor > minimum[0] ||
+    (minor === minimum[0] && patch >= minimum[1]));
+
+  if (!patched) {
+    throw new Error(
+      `CVE-2026-111497: Node.js ${process.versions.node} is not an approved patched runtime. ` +
+      'Use Node.js 22.23.4+, 24.22.1+ or 26.12.1+ within those release lines. ' +
+      'Recommended: nvm install && nvm use (see .nvmrc). Restart all server/PM2 processes after upgrading.'
+    );
+  }
+}
+
+requireSafeNode();
+module.exports = requireSafeNode;

backend/server.js

@@ -1,3 +1,4 @@
+import './scripts/require-safe-node.cjs';
 import express from 'express';
 import path from 'path';
 import { fileURLToPath } from 'url';