From c7be984e890f5dbe8d4e4d329d2680a1f3485b31 Mon Sep 17 00:00:00 2001
From: Antoine du Hamel <duhamelantoine1995@gmail.com>
Date: Wed, 10 Dec 2025 13:29:58 +0100
Subject: [PATCH 1/2] lib: enforce use of `URLParse`

There's no reason to use the user-mutable `URL.parse` in  core.
---
 lib/eslint.config_partial.mjs         | 4 ++++
 lib/internal/socketaddress.js         | 4 ++--
 lib/internal/test_runner/mock/mock.js | 3 ++-
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/lib/eslint.config_partial.mjs b/lib/eslint.config_partial.mjs
index fc899bff694524..bb5b4d8cc7c980 100644
--- a/lib/eslint.config_partial.mjs
+++ b/lib/eslint.config_partial.mjs
@@ -30,6 +30,10 @@ const noRestrictedSyntax = [
     selector: "CallExpression[callee.object.name='Error'][callee.property.name='captureStackTrace']",
     message: "Use 'hideStackFrames' from 'internal/errors' instead.",
   },
+  {
+    selector: "CallExpression[callee.object.name='URL'][callee.property.name='parse']",
+    message: "Use 'URLParse' from 'internal/url' instead.",
+  },
   {
     selector: "AssignmentExpression:matches([left.object.name='Error']):matches([left.name='prepareStackTrace'], [left.property.name='prepareStackTrace'])",
     message: "Use 'overrideStackTrace' from 'internal/errors' instead.",
diff --git a/lib/internal/socketaddress.js b/lib/internal/socketaddress.js
index 7fbe63980a0226..724ffd90cf77f1 100644
--- a/lib/internal/socketaddress.js
+++ b/lib/internal/socketaddress.js
@@ -37,7 +37,7 @@ const {
   kDeserialize,
 } = require('internal/worker/js_transferable');
 
-const { URL } = require('internal/url');
+const { URLParse } = require('internal/url');
 
 const kHandle = Symbol('kHandle');
 const kDetail = Symbol('kDetail');
@@ -156,7 +156,7 @@ class SocketAddress {
       const {
         hostname: address,
         port,
-      } = URL.parse(`http://${input}`);
+      } = URLParse(`http://${input}`);
       if (address.startsWith('[') && address.endsWith(']')) {
         return new SocketAddress({
           address: address.slice(1, -1),
diff --git a/lib/internal/test_runner/mock/mock.js b/lib/internal/test_runner/mock/mock.js
index c018d1690fc9fb..5322873abbdc81 100644
--- a/lib/internal/test_runner/mock/mock.js
+++ b/lib/internal/test_runner/mock/mock.js
@@ -31,6 +31,7 @@ const {
   isURL,
   pathToFileURL,
   URL,
+  URLParse,
 } = require('internal/url');
 const {
   emitExperimentalWarning,
@@ -652,7 +653,7 @@ class MockTracker {
     if (format) { // Format is not yet known for ambiguous files when detection is enabled.
       validateOneOf(format, 'format', kSupportedFormats);
     }
-    const baseURL = URL.parse(url);
+    const baseURL = URLParse(url);
 
     if (!baseURL) {
       throw new ERR_INVALID_ARG_VALUE(

From aa8c4f3ad82aace6a069ae50b24560783900907a Mon Sep 17 00:00:00 2001
From: Antoine du Hamel <duhamelantoine1995@gmail.com>
Date: Wed, 10 Dec 2025 13:37:26 +0100
Subject: [PATCH 2/2] fixup! lib: enforce use of `URLParse`

---
 lib/internal/test_runner/mock/mock.js | 1 -
 1 file changed, 1 deletion(-)

diff --git a/lib/internal/test_runner/mock/mock.js b/lib/internal/test_runner/mock/mock.js
index 5322873abbdc81..1af24c77a10731 100644
--- a/lib/internal/test_runner/mock/mock.js
+++ b/lib/internal/test_runner/mock/mock.js
@@ -30,7 +30,6 @@ const {
   fileURLToPath,
   isURL,
   pathToFileURL,
-  URL,
   URLParse,
 } = require('internal/url');
 const {