Merge pull request #540 from progfay/fix-link-ReDoS

Fix(ExternalLinkNode): fix Inefficient regular expression

Author: progfay

src/block/node/ExternalLinkNode.ts

@@ -3,9 +3,9 @@ import { createNodeParser } from './creator'
 import type { LinkNode } from './type'
 import type { NodeCreator } from './creator'
 
-const hrefFirstUrlRegExp = /\[https?:\/\/[^\s\]]+(?:\s+[^\]]*[^\s])?\]/
-const contentFirstUrlRegExp = /\[[^\]]*[^\s]\s+https?:\/\/[^\s\]]+\]/
-const httpRegExp = /(?<=^| )https?:\/\/[^\s\]]+/
+const hrefFirstUrlRegExp = /\[https?:\/\/[^\s\]]+(?:\s+[^[\]]*[^\s])?\]/
+const contentFirstUrlRegExp = /\[[^[\]]*[^\s]\s+https?:\/\/[^\s\]]+\]/
+const httpRegExp = /(?<=^| )https?:\/\/[^[\s\]]+/
 
 const createExternalLinkNode: NodeCreator<LinkNode> = raw => {
   const inner = raw.startsWith('[') && raw.endsWith(']') ? raw.substring(1, raw.length - 1) : raw