CVE-2026-59710

A flaw was found in Showdown. This vulnerability, a stored cross-site scripting XSS issue, allows an attacker to inject malicious code into web pages. By exploiting unescaped table header ID attributes in markdown, an attacker can embed arbitrary HTML and script-executing elements. When untrusted...

CVE-2026-59710 showdown - Stored XSS via Unescaped Table Header ID Attribute Injection

showdown contains a stored cross-site scripting vulnerability in the parseHeaders function of src/subParsers/makehtml/tables.js that fails to properly escape table header ID attributes. Attackers can inject arbitrary HTML and script-executing SVG elements through double-quote characters in markdo...