CVE-2026-104077 Obsidian Desktop < 1.14.0 RCE via Slides Plugin Markdown
Attackers can execute arbitrary code by crafting malicious Markdown notes that bypass sanitization in the Slides plugin, requiring user interaction to start the presentation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-104077?
CVE-2026-104077 is a high-severity cross-site scripting vulnerability in Obsidian Desktop, published on 8 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Obsidian Desktop before 1.14.0 contains a remote code execution vulnerability that allows attackers to craft malicious Markdown notes exploiting insufficient sanitization of the data-background-iframe attribute, which bypasses DOMPurify and is processed by the bundled Reveal.js 4.3.1 within the Slides core plugin, allowing a javascript: URL to execute in the resulting background iframe. Because Node integration is enabled and context isolation is disabled in Obsidian's vault renderer, the injected script can call parent.require() to access Node APIs such as fs and child_process, enabling arbitrary operating system command execution when the victim opens the note and manually starts the presentation.
Which versions are affected by CVE-2026-104077?
How do I fix CVE-2026-104077?
No fix has been published for CVE-2026-104077 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-104077 being exploited?
There is no known exploitation of CVE-2026-104077 in the wild and no public exploit code.
Sources
Also known as GHSA-fj5r-pww3-qc5p.