diff --git a/src/vs/platform/url/common/trustedDomains.ts b/src/vs/platform/url/common/trustedDomains.ts
index f6b5348663356..bb18f68322e07 100644
--- a/src/vs/platform/url/common/trustedDomains.ts
+++ b/src/vs/platform/url/common/trustedDomains.ts
@@ -52,7 +52,8 @@ export function normalizeURL(url: string | URI): string {
 
 const rLocalhost = /^(.+\.)?localhost(:\d+)?$/i;
 const r127 = /^127.0.0.1(:\d+)?$/;
+const rIPv6Localhost = /^\[::1\](:\d+)?$/;
 
 export function isLocalhostAuthority(authority: string) {
-	return rLocalhost.test(authority) || r127.test(authority);
+	return rLocalhost.test(authority) || r127.test(authority) || rIPv6Localhost.test(authority);
 }
diff --git a/src/vs/platform/url/test/common/trustedDomains.test.ts b/src/vs/platform/url/test/common/trustedDomains.test.ts
index ca7865baa6840..7bb6bfdd501c3 100644
--- a/src/vs/platform/url/test/common/trustedDomains.test.ts
+++ b/src/vs/platform/url/test/common/trustedDomains.test.ts
@@ -18,6 +18,8 @@ suite('trustedDomains', () => {
 			assert.strictEqual(isURLDomainTrusted(URI.parse('http://localhost:3000'), []), true);
 			assert.strictEqual(isURLDomainTrusted(URI.parse('http://127.0.0.1:3000'), []), true);
 			assert.strictEqual(isURLDomainTrusted(URI.parse('http://subdomain.localhost'), []), true);
+			assert.strictEqual(isURLDomainTrusted(URI.parse('https://[::1]'), []), true);
+			assert.strictEqual(isURLDomainTrusted(URI.parse('http://[::1]:3000'), []), true);
 		});
 
 		test('wildcard (*) matches everything', () => {
@@ -116,11 +118,20 @@ suite('trustedDomains', () => {
 			assert.strictEqual(isLocalhostAuthority('SUB.LOCALHOST'), true);
 		});
 
+		test('recognizes IPv6 localhost [::1]', () => {
+			assert.strictEqual(isLocalhostAuthority('[::1]'), true);
+			assert.strictEqual(isLocalhostAuthority('[::1]:3000'), true);
+			assert.strictEqual(isLocalhostAuthority('[::1]:8080'), true);
+		});
+
 		test('does not match non-localhost authorities', () => {
 			assert.strictEqual(isLocalhostAuthority('example.com'), false);
 			assert.strictEqual(isLocalhostAuthority('notlocalhost.com'), false);
 			assert.strictEqual(isLocalhostAuthority('127.0.0.2'), false);
 			assert.strictEqual(isLocalhostAuthority('192.168.1.1'), false);
+			assert.strictEqual(isLocalhostAuthority('[::]'), false);
+			assert.strictEqual(isLocalhostAuthority('[::2]'), false);
+			assert.strictEqual(isLocalhostAuthority('[::1'), false);
 		});
 	});
 });