fix: sichere Brotli-Laufzeit ab und erhöhe Patchversionen

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;