CVE-2026-104077: Obsidian Desktop < 1.14.0 RCE via Slides Plugin Markdown

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-08 · updated 2026-10-27
Weakness: CWE-79

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.

Affected products

Obsidian Desktop: before 1.14.0 — fixed in 1.14.0

How to fix

Upgrade to a fixed version: Obsidian Desktop 1.14.0. Check the vendor advisory for mitigations.

References

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