From 8769968141c107864ffa988bbdaabe61f63f836e Mon Sep 17 00:00:00 2001
From: Salihu <salihudickson@gmail.com>
Date: Sun, 9 Aug 2026 20:46:30 +0100
Subject: [PATCH] fix exponential backtracking in regex

---
 packages/editor-ext/src/lib/markdown/utils/tabs.marked.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/editor-ext/src/lib/markdown/utils/tabs.marked.ts b/packages/editor-ext/src/lib/markdown/utils/tabs.marked.ts
index ed54b78ea..54e2f3372 100644
--- a/packages/editor-ext/src/lib/markdown/utils/tabs.marked.ts
+++ b/packages/editor-ext/src/lib/markdown/utils/tabs.marked.ts
@@ -14,7 +14,7 @@ interface TabbedToken {
 }
 
 const HEADER_RE =
-  /^===([!+])?\s*["'“”‘’]((?:\\.|[^"'“”‘’\n])+?)["'“”‘’]\s*$/gm;
+  /^===([!+])?\s*["'“”‘’]((?:\\["\\]|[^\\"'“”‘’\n])+?)["'“”‘’]\s*$/gm;
 
 export const tabsExtension = {
   name: 'tabbed',