diff --git a/lib/core/util.js b/lib/core/util.js
index 71071aff47f..c7e1f16135a 100644
--- a/lib/core/util.js
+++ b/lib/core/util.js
@@ -13,7 +13,7 @@ const { InvalidArgumentError } = require('./errors')
 const { headerNameLowerCasedRecord } = require('./constants')
 const { tree } = require('./tree')
 
-const [nodeMajor, nodeMinor] = process.versions.node.split('.').map(v => Number(v))
+const [nodeMajor, nodeMinor] = process.versions.node.split('.', 2).map(v => Number(v))
 
 class BodyAsyncIterable {
   constructor (body) {
diff --git a/lib/mock/mock-utils.js b/lib/mock/mock-utils.js
index 7e79d88c507..a41825459a4 100644
--- a/lib/mock/mock-utils.js
+++ b/lib/mock/mock-utils.js
@@ -97,7 +97,7 @@ function safeUrl (path) {
     return path
   }
 
-  const pathSegments = path.split('?')
+  const pathSegments = path.split('?', 3)
 
   if (pathSegments.length !== 2) {
     return path
diff --git a/lib/web/websocket/util.js b/lib/web/websocket/util.js
index 3e9c5479043..ae8f076c0fb 100644
--- a/lib/web/websocket/util.js
+++ b/lib/web/websocket/util.js
@@ -206,7 +206,7 @@ function parseExtensions (extensions) {
 
   while (position.position < extensions.length) {
     const pair = collectASequenceOfCodePointsFast(';', extensions, position)
-    const [name, value = ''] = pair.split('=')
+    const [name, value = ''] = pair.split('=', 2)
 
     extensionList.set(
       removeHTTPWhitespace(name, true, false),