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.
Published: 2026-10-08
Score: 8.5 High
EPSS: n/a
KEV: No
Impact: Remote Code Execution
Action: Immediate Patch
AI Analysis

Impact

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 Systems

Users of Obsidian Desktop versions prior to 1.14.0 that have the Slides plugin installed. The issue is limited to the desktop application and requires the user to open a malicious note and start a presentation.

Risk and Exploitability

The CVSS score is 8.5 and the vulnerability is not listed in the CISA KEV catalog. The EPSS score is unavailable. Exploitation requires social engineering to deliver a note, but once opened the attacker can run commands with the desktop user’s privileges, indicating a high risk of remote code execution.

Generated by OpenCVE AI on October 8, 2026 at 18:56 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade Obsidian Desktop to version 1.14.0 or later
  • Disable or uninstall the Slides plugin until a patch is available
  • Avoid opening or sharing Markdown files from untrusted sources

Generated by OpenCVE AI on October 8, 2026 at 18:56 UTC.

Tracking

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Advisories

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History

Thu, 08 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Thu, 08 Oct 2026 17:00:00 +0000

Type Values Removed Values Added
Description 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. 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.
Weaknesses CWE-1188
Metrics cvssV4_0

{'score': 8.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

 cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Thu, 08 Oct 2026 16:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Obsidian Desktop < 1.14.0 RCE via Slides Plugin Markdown
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-08T17:14:40.634Z

Reserved: 2026-10-01T18:02:50.083Z

Link: CVE-2026-104077

cve-icon Vulnrichment

Updated: 2026-10-08T17:14:36.478Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-08T17:17:11.603

Modified: 2026-10-08T21:33:42.423

Link: CVE-2026-104077

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-08T19:00:07Z

Weaknesses
  • CWE-1188

    Initialization of a Resource with an Insecure Default

  • CWE-79

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')