diff --git a/packages/commonjs/src/resolve-require-sources.js b/packages/commonjs/src/resolve-require-sources.js
index 6756a06c3..db1603dd5 100644
--- a/packages/commonjs/src/resolve-require-sources.js
+++ b/packages/commonjs/src/resolve-require-sources.js
@@ -195,22 +195,35 @@ export function getRequireResolver(extensions, detectCyclesAndConditional, curre
             getTypeForFullyAnalyzedModule(dependencyId));
           // Special-case external Node built-ins to be handled via a lazy __require
           // helper instead of hoisted ESM imports when strict wrapping is used.
+          const isExternalWrapped = isWrappedId(dependencyId, EXTERNAL_SUFFIX);
           if (
             parentMeta.initialCommonJSType === IS_WRAPPED_COMMONJS &&
             !allowProxy &&
-            isWrappedId(dependencyId, EXTERNAL_SUFFIX)
+            isExternalWrapped
           ) {
-            const actualId = unwrapId(dependencyId, EXTERNAL_SUFFIX);
-            const isNodeBuiltin = actualId.startsWith('node:');
-            if (isNodeBuiltin) {
+            const actualExternalId = unwrapId(dependencyId, EXTERNAL_SUFFIX);
+            if (actualExternalId.startsWith('node:')) {
               isCommonJS = IS_WRAPPED_COMMONJS;
+              parentMeta.isRequiredCommonJS[dependencyId] = isCommonJS;
             }
           }
           const isWrappedCommonJS = isCommonJS === IS_WRAPPED_COMMONJS;
           fullyAnalyzedModules[dependencyId] = true;
+          const moduleInfo =
+            isWrappedCommonJS && !isExternalWrapped
+              ? rollupContext.getModuleInfo(dependencyId)
+              : null;
+          // For wrapped dependencies, annotate the generated require call as pure only
+          // when Rollup has module info and it explicitly reports no side effects.
+          // Note: For external Node built-ins (handled via EXTERNAL_SUFFIX), the module
+          // has not been loaded yet at this point and getModuleInfo returns null.
+          // Default to side effects = true in that case to be safe.
+          // Preserve Rollup's tri-state semantics (true | false | 'no-treeshake') when available.
+          const wrappedModuleSideEffects = !isWrappedCommonJS
+            ? false
+            : moduleInfo?.moduleSideEffects ?? true;
           return {
-            wrappedModuleSideEffects:
-              isWrappedCommonJS && rollupContext.getModuleInfo(dependencyId).moduleSideEffects,
+            wrappedModuleSideEffects,
             source: sources[index].source,
             id: allowProxy
               ? wrapId(dependencyId, isWrappedCommonJS ? WRAPPED_SUFFIX : PROXY_SUFFIX)
diff --git a/packages/commonjs/test/fixtures/function/module-side-effects-external-node-builtin-wrapped/_config.js b/packages/commonjs/test/fixtures/function/module-side-effects-external-node-builtin-wrapped/_config.js
new file mode 100644
index 000000000..6bc57ba61
--- /dev/null
+++ b/packages/commonjs/test/fixtures/function/module-side-effects-external-node-builtin-wrapped/_config.js
@@ -0,0 +1,10 @@
+module.exports = {
+  description:
+    'does not crash and does not mark external node: builtins as pure when strictRequires is true',
+  pluginOptions: {
+    strictRequires: true
+  },
+  context: {
+    __filename: __filename
+  }
+};
diff --git a/packages/commonjs/test/fixtures/function/module-side-effects-external-node-builtin-wrapped/main.js b/packages/commonjs/test/fixtures/function/module-side-effects-external-node-builtin-wrapped/main.js
new file mode 100644
index 000000000..b6c0d07c2
--- /dev/null
+++ b/packages/commonjs/test/fixtures/function/module-side-effects-external-node-builtin-wrapped/main.js
@@ -0,0 +1,8 @@
+// Top-level require of a Node builtin ensures the transform computes
+// wrappedModuleSideEffects for an external wrapped dependency.
+function unused() {
+  // External Node builtin require; not executed at runtime
+  require('node:crypto');
+}
+
+module.exports = 1;
diff --git a/packages/commonjs/test/snapshots/function.js.md b/packages/commonjs/test/snapshots/function.js.md
index 1c251e72d..d42cefb65 100644
--- a/packages/commonjs/test/snapshots/function.js.md
+++ b/packages/commonjs/test/snapshots/function.js.md
@@ -6697,6 +6697,40 @@ Generated by [AVA](https://avajs.dev).
       `,
     }
 
+## module-side-effects-external-node-builtin-wrapped
+
+> Snapshot 1
+
+    {
+      'main.js': `'use strict';␊
+      ␊
+      var node_module = require('node:module');␊
+      ␊
+      var _documentCurrentScript = typeof document !== 'undefined' ? document.currentScript : null;␊
+      function getDefaultExportFromCjs (x) {␊
+      	return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;␊
+      }␊
+      ␊
+      node_module.createRequire((typeof document === 'undefined' ? require('u' + 'rl').pathToFileURL(__filename).href : (_documentCurrentScript && _documentCurrentScript.src || new URL('main.js', document.baseURI).href)));␊
+      ␊
+      var main$1;␊
+      var hasRequiredMain;␊
+      ␊
+      function requireMain () {␊
+      	if (hasRequiredMain) return main$1;␊
+      	hasRequiredMain = 1;␊
+      ␊
+      	main$1 = 1;␊
+      	return main$1;␊
+      }␊
+      ␊
+      var mainExports = requireMain();␊
+      var main = /*@__PURE__*/getDefaultExportFromCjs(mainExports);␊
+      ␊
+      module.exports = main;␊
+      `,
+    }
+
 ## module-side-effects-import-wrapped
 
 > Snapshot 1
diff --git a/packages/commonjs/test/snapshots/function.js.snap b/packages/commonjs/test/snapshots/function.js.snap
index 2f11e8c91..591ed4029 100644
Binary files a/packages/commonjs/test/snapshots/function.js.snap and b/packages/commonjs/test/snapshots/function.js.snap differ