From c556624d0ed85dda5789e4e2dd7e38fbc3a47dd8 Mon Sep 17 00:00:00 2001
From: Lime <59763878+code-lime@users.noreply.github.com>
Date: Tue, 17 Mar 2026 23:07:25 +0300
Subject: [PATCH] Add GitHub Pages content in Markdown support (#5522)

* add `allowedHostnameSuffixes` with `.github.io` support

* apply `prettier`

---------

Co-authored-by: Prospector <6166773+Prospector@users.noreply.github.com>
---
 packages/utils/parse.ts | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/packages/utils/parse.ts b/packages/utils/parse.ts
index d981d07b2..646caa5ae 100644
--- a/packages/utils/parse.ts
+++ b/packages/utils/parse.ts
@@ -109,7 +109,12 @@ export const configuredXss = new FilterXSS({
 					'bstats.org',
 				]
 
-				if (!allowedHostnames.includes(url.hostname)) {
+				const allowedHostnameSuffixes = ['.github.io']
+
+				if (
+					!allowedHostnames.includes(url.hostname) &&
+					!allowedHostnameSuffixes.some((suffix) => url.hostname.endsWith(suffix))
+				) {
 					return safeAttrValue(
 						tag,
 						name,