CVE-2026-104077

Obsidian Desktop before 1.14.0 contains an arbitrary code execution vulnerability in the Slides core plugin that allows attackers to craft a malicious Markdown note containing a data-background-iframe attribute that survives DOMPurify sanitization. When the victim opens the note and starts it as a presentation, Reveal.js promotes the attacker-controlled value to an iframe src without URL-scheme restrictions, executing a javascript: payload that reaches Node.js APIs via parent.require in the Node-integrated, context-isolation-disabled renderer to achieve arbitrary command execution as the Obsidian user.