Obsidian Desktop up to 1.13.x Safe filterURL href input validation

Summaryinfo

A vulnerability was found in Obsidian Desktop up to 1.13.x. It has been classified as problematic. This affects the function filterURL of the component Safe. This manipulation of the argument href causes input validation. This vulnerability appears as CVE-2026-104078. The attack requires local access. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Obsidian Desktop up to 1.13.x. It has been declared as problematic. Affected by this vulnerability is the function filterURL of the component Safe. The manipulation of the argument href with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Obsidian Desktop before 1.14.0 contains a filter bypass vulnerability in the bundled MathJax 3.2.2 Safe component that allows attackers to execute arbitrary code by embedding a crafted \href value with a TAB byte in the URL scheme, causing filterURL to produce an empty protocol that bypasses the configured safeProtocols restrictions. Attackers can craft a note containing a malicious MathJax formula that renders as a javascript: URL anchor, which when clicked by the victim in Live Preview executes in the Node-integration-enabled vault renderer via require('child_process'), achieving arbitrary operating system command execution as the desktop user.

It is possible to read the advisory at obsidian.md. This vulnerability is known as CVE-2026-104078 since 10/01/2026. The exploitation appears to be easy. Attacking locally is a requirement. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.14.0 eliminates this vulnerability.

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Productinfo

Vendor

• Obsidian

Name

• Desktop

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13

CPE 2.3info

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CPE 2.2info

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