CVE-2026-104077: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Obsidian Obsidian Desktop
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.
CVSS v4.0
Score 8.5high
Affected software
Obsidian
Obsidian Desktop
pkg:github/obsidianmd/obsidianRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-104077 is a cross-site scripting vulnerability in Obsidian Desktop prior to version 1.14.0. The flaw exists in the Slides core plugin where a malicious Markdown note containing a specially crafted data-background-iframe attribute bypasses DOMPurify sanitization. When the note is opened and presented, Reveal.js uses the attacker-controlled value as an iframe src without URL scheme restrictions, allowing execution of a javascript: payload. This payload can access Node.js APIs via parent.require in the Node-integrated, context-isolation-disabled renderer, resulting in arbitrary command execution with the privileges of the Obsidian user.
Potential Impact
An attacker can execute arbitrary commands on the victim's system with the same privileges as the user running Obsidian Desktop. This can lead to full compromise of the user's environment where Obsidian is installed. The vulnerability requires user interaction (opening and presenting the malicious note) but does not require prior privileges or authentication.
Mitigation Recommendations
A fix is available in Obsidian Desktop version 1.14.0 and later. Users should upgrade to version 1.14.0 or newer to remediate this vulnerability. No other mitigation guidance is provided or necessary as the vulnerability is addressed by the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-01T18:02:50.083Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ac7c7552cdf04f65629fffe
Added to database: 10/08/2026, 16:39:49 UTC
Last enriched: 10/08/2026, 16:48:16 UTC
Last updated: 10/08/2026, 21:46:00 UTC
Views: 8
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