diff --git a/packages/nodejs/src/polyfills.ts b/packages/nodejs/src/polyfills.ts
index 5ca5be5a..9885bcb9 100644
--- a/packages/nodejs/src/polyfills.ts
+++ b/packages/nodejs/src/polyfills.ts
@@ -17,6 +17,7 @@ const WEB_STREAMS_PONYFILL_PATH = require.resolve(
 
 const CUSTOM_POLYFILL_ENTRY_POINTS = new Map([
 	["crypto", resolveCustomPolyfillSource("crypto.js")],
+	["path", resolveCustomPolyfillSource("path.js")],
 	["stream/web", resolveCustomPolyfillSource("stream-web.js")],
 	["util/types", resolveCustomPolyfillSource("util-types.js")],
 	["internal/webstreams/util", resolveCustomPolyfillSource("internal-webstreams-util.js")],
@@ -60,6 +61,9 @@ export async function bundlePolyfill(moduleName: string): Promise<string> {
 	if (typeof stdLibBrowser.crypto === "string") {
 		alias.__secure_exec_crypto_browserify__ = stdLibBrowser.crypto;
 	}
+	if (typeof stdLibBrowser.path === "string") {
+		alias.__secure_exec_path_browserify__ = stdLibBrowser.path;
+	}
 	alias["web-streams-polyfill/dist/ponyfill.js"] = WEB_STREAMS_PONYFILL_PATH;
 
 	// Bundle using esbuild with CommonJS format
diff --git a/packages/nodejs/src/polyfills/path.js b/packages/nodejs/src/polyfills/path.js
new file mode 100644
index 00000000..9b01a4b3
--- /dev/null
+++ b/packages/nodejs/src/polyfills/path.js
@@ -0,0 +1,74 @@
+// Custom path polyfill wrapper — adds Node.js ERR_* error codes to path-browserify errors
+// Fixes https://github.com/rivet-dev/secure-exec/issues/28
+//
+// path-browserify throws plain TypeError for invalid arguments.
+// Real Node.js attaches a `.code` property (e.g., ERR_INVALID_ARG_TYPE).
+// This wrapper catches those errors and adds the missing code before re-throwing.
+
+import pathBrowserify from "__secure_exec_path_browserify__";
+
+function wrapPathFn(fn) {
+	return function () {
+		try {
+			return fn.apply(this, arguments);
+		} catch (err) {
+			if (err instanceof TypeError && !err.code) {
+				err.code = "ERR_INVALID_ARG_TYPE";
+			}
+			throw err;
+		}
+	};
+}
+
+// Build wrapped module that mirrors path-browserify's exports
+const wrapped = {};
+const keys = Object.keys(pathBrowserify);
+for (let i = 0; i < keys.length; i++) {
+	const key = keys[i];
+	if (typeof pathBrowserify[key] === "function") {
+		wrapped[key] = wrapPathFn(pathBrowserify[key]);
+	} else {
+		wrapped[key] = pathBrowserify[key];
+	}
+}
+
+// Wrap posix sub-object functions too (path.posix.join, etc.)
+if (pathBrowserify.posix && typeof pathBrowserify.posix === "object") {
+	const wrappedPosix = {};
+	const posixKeys = Object.keys(pathBrowserify.posix);
+	for (let j = 0; j < posixKeys.length; j++) {
+		const pk = posixKeys[j];
+		if (typeof pathBrowserify.posix[pk] === "function") {
+			wrappedPosix[pk] = wrapPathFn(pathBrowserify.posix[pk]);
+		} else {
+			wrappedPosix[pk] = pathBrowserify.posix[pk];
+		}
+	}
+	wrappedPosix.posix = wrappedPosix;
+	wrapped.posix = wrappedPosix;
+} else {
+	// path-browserify sets posix = module.exports (self-reference)
+	wrapped.posix = wrapped;
+}
+
+// Preserve standard path properties
+wrapped.sep = pathBrowserify.sep || "/";
+wrapped.delimiter = pathBrowserify.delimiter || ":";
+
+// Named exports for common path functions
+export const join = wrapped.join;
+export const resolve = wrapped.resolve;
+export const normalize = wrapped.normalize;
+export const isAbsolute = wrapped.isAbsolute;
+export const relative = wrapped.relative;
+export const dirname = wrapped.dirname;
+export const basename = wrapped.basename;
+export const extname = wrapped.extname;
+export const parse = wrapped.parse;
+export const format = wrapped.format;
+export const toNamespacedPath = wrapped.toNamespacedPath;
+export const sep = wrapped.sep;
+export const delimiter = wrapped.delimiter;
+export const posix = wrapped.posix;
+
+export default wrapped;