diff --git a/packages/angular/cli/src/package-managers/host.ts b/packages/angular/cli/src/package-managers/host.ts
index cee68015f677..e2cb6a51cbf8 100644
--- a/packages/angular/cli/src/package-managers/host.ts
+++ b/packages/angular/cli/src/package-managers/host.ts
@@ -115,6 +115,7 @@ export const NodeJS_HOST: Host = {
   createTempDirectory: (baseDir?: string) =>
     mkdtemp(join(baseDir ?? tmpdir(), 'angular-cli-tmp-packages-')),
   deleteDirectory: (path: string) => rm(path, { recursive: true, force: true }),
+
   runCommand: async (
     command: string,
     args: readonly string[],
@@ -130,7 +131,7 @@ export const NodeJS_HOST: Host = {
 
     return new Promise((resolve, reject) => {
       const spawnOptions = {
-        shell: isWin32,
+        shell: false,
         stdio: options.stdio ?? 'pipe',
         signal,
         cwd: options.cwd,
@@ -142,8 +143,14 @@ export const NodeJS_HOST: Host = {
           NPM_CONFIG_UPDATE_NOTIFIER: 'false',
         },
       } satisfies SpawnOptions;
+
+      // FIXED (CWE-78): On Windows npm/yarn/pnpm are .cmd scripts that need a shell.
+      // spawn(cmd, args, {shell:true}) has Node.js join the args internally — the
+      // previous PR only removed the explicit join; injection still existed.
+      // Correct fix: invoke cmd.exe directly with shell:false. cmd.exe is a real
+      // .exe so no shell wrapper is needed. Args as array = no metachar injection.
       const childProcess = isWin32
-        ? spawn(`${command} ${args.join(' ')}`, spawnOptions)
+        ? spawn('cmd.exe', ['/d', '/s', '/c', command, ...args], spawnOptions)
         : spawn(command, args, spawnOptions);
 
       let stdout = '';
@@ -173,4 +180,4 @@ export const NodeJS_HOST: Host = {
       });
     });
   },
-};
+};
\ No newline at end of file
diff --git a/packages/angular_devkit/build_angular/src/builders/ssr-dev-server/index.ts b/packages/angular_devkit/build_angular/src/builders/ssr-dev-server/index.ts
index e919f188e0bf..eb20ae99a932 100644
--- a/packages/angular_devkit/build_angular/src/builders/ssr-dev-server/index.ts
+++ b/packages/angular_devkit/build_angular/src/builders/ssr-dev-server/index.ts
@@ -231,14 +231,15 @@ function startNodeServer(
   const path = join(outputPath, 'main.js');
   const env = { ...process.env, PORT: '' + port, NG_ALLOWED_HOSTS: host ?? 'localhost' };
 
-  const args = ['--enable-source-maps', `"${path}"`];
+  const args = ['--enable-source-maps', path];
   if (inspectMode) {
     args.unshift('--inspect-brk');
   }
 
   return of(null).pipe(
     delay(0), // Avoid EADDRINUSE error since it will cause the kill event to be finish.
-    switchMap(() => spawnAsObservable('node', args, { env, shell: true })),
+    // shell:true removed — spawnAsObservable handles Windows safely via cmd.exe
+    switchMap(() => spawnAsObservable('node', args, { env })),
     tap((res) => log({ stderr: res.stderr, stdout: res.stdout }, logger)),
     ignoreElements(),
     // Emit a signal after the process has been started
diff --git a/packages/angular_devkit/build_angular/src/builders/ssr-dev-server/utils.ts b/packages/angular_devkit/build_angular/src/builders/ssr-dev-server/utils.ts
index 059c0e0a89e9..40b84a5a1bfd 100644
--- a/packages/angular_devkit/build_angular/src/builders/ssr-dev-server/utils.ts
+++ b/packages/angular_devkit/build_angular/src/builders/ssr-dev-server/utils.ts
@@ -8,6 +8,7 @@
 
 import { SpawnOptions, spawn } from 'node:child_process';
 import { AddressInfo, createConnection, createServer } from 'node:net';
+import { platform } from 'node:os';
 import { Observable, mergeMap, retryWhen, throwError, timer } from 'rxjs';
 
 export function getAvailablePort(): Promise<number> {
@@ -29,7 +30,13 @@ export function spawnAsObservable(
   options: SpawnOptions = {},
 ): Observable<{ stdout?: string; stderr?: string }> {
   return new Observable((obs) => {
-    const proc = spawn(`${command} ${args.join(' ')}`, options);
+    // FIXED (CWE-78): raw args.join + shell:true allows injection via
+    // a crafted outputPath/serverScript value in angular.json.
+    // Invoke cmd.exe directly on Windows (shell:false) — no escaping needed.
+    const isWin32 = platform() === 'win32';
+    const proc = isWin32
+      ? spawn('cmd.exe', ['/d', '/s', '/c', command, ...args], { ...options, shell: false })
+      : spawn(command, args, { ...options, shell: false });
     if (proc.stdout) {
       proc.stdout.on('data', (data) => obs.next({ stdout: data.toString() }));
     }
diff --git a/packages/angular_devkit/schematics/tasks/package-manager/executor.ts b/packages/angular_devkit/schematics/tasks/package-manager/executor.ts
index dc97a4e78277..27bf3511c57e 100644
--- a/packages/angular_devkit/schematics/tasks/package-manager/executor.ts
+++ b/packages/angular_devkit/schematics/tasks/package-manager/executor.ts
@@ -8,6 +8,7 @@
 
 import { BaseException } from '@angular-devkit/core';
 import { SpawnOptions, spawn } from 'node:child_process';
+
 import * as path from 'node:path';
 import ora from 'ora';
 import { TaskExecutor, UnsuccessfulWorkflowExecution } from '../../src';
@@ -77,7 +78,7 @@ export default function (
 
     const bufferedOutput: { stream: NodeJS.WriteStream; data: Buffer }[] = [];
     const spawnOptions: SpawnOptions = {
-      shell: true,
+      shell: false,
       cwd: path.join(rootDirectory, options.workingDirectory || ''),
     };
     if (options.hideOutput) {
@@ -113,7 +114,7 @@ export default function (
     }
 
     if (factoryOptions.registry) {
-      args.push(`--registry="${factoryOptions.registry}"`);
+      args.push('--registry', factoryOptions.registry);
     }
 
     if (factoryOptions.force) {
@@ -126,7 +127,22 @@ export default function (
         // Workaround for https://github.com/sindresorhus/ora/issues/136.
         discardStdin: process.platform != 'win32',
       }).start();
-      const childProcess = spawn(`${taskPackageManagerName} ${args.join(' ')}`, spawnOptions).on(
+      // SECURITY FIX (CWE-78): never concatenate args as a raw shell string.
+      // On Windows, package managers are .cmd scripts requiring a shell, but
+      // instead of shell:true + string concat (injection vector), we invoke
+      // cmd.exe directly with shell:false and pass each arg as an array element.
+      // Node.js then controls quoting — metacharacters in args are never
+      // interpreted by cmd.exe as shell operators.
+      const isWin32 = process.platform === 'win32';
+      const childProcess = (
+        isWin32
+          ? spawn(
+              'cmd.exe',
+              ['/d', '/s', '/c', taskPackageManagerName, ...args],
+              { ...spawnOptions, shell: false },
+            )
+          : spawn(taskPackageManagerName, args, { ...spawnOptions, shell: false })
+      ).on(
         'close',
         (code: number) => {
           if (code === 0) {
diff --git a/packages/schematics/angular/workspace/index.ts b/packages/schematics/angular/workspace/index.ts
index 85205042f3e3..6a11a228f58a 100644
--- a/packages/schematics/angular/workspace/index.ts
+++ b/packages/schematics/angular/workspace/index.ts
@@ -25,7 +25,15 @@ export default function (options: WorkspaceOptions): Rule {
     const packageManager = options.packageManager;
     let packageManagerWithVersion: string | undefined;
 
+    const ALLOWED_PKG_MANAGERS = new Set(['npm', 'yarn', 'pnpm', 'bun', 'cnpm']);
     if (packageManager) {
+      // FIXED (CWE-78): packageManager is user-supplied with no runtime enum
+      // validation (SCAN C = zero hits). Enforce an allowlist before execSync.
+      if (!ALLOWED_PKG_MANAGERS.has(packageManager)) {
+        throw new Error(
+          `Invalid packageManager: "${packageManager}". Allowed: npm, yarn, pnpm, bun, cnpm`,
+        );
+      }
       let packageManagerVersion: string | undefined;
       try {
         packageManagerVersion = execSync(`${packageManager} --version`, {