PT-2026-35065

Name of the Vulnerable Software and Affected Versions SiYuan versions prior to 3.6.5 Description SiYuan desktop renders notification messages as raw HTML within an Electron renderer. The API endpoint '/api/notification/pushMsg' accepts a user-controlled msg value, which is forwarded through the...

CVE-2026-40922

SiYuan is an open-source personal knowledge management system. In versions 3.6.1 through 3.6.3, a prior fix for XSS in bazaar README rendering incomplete fix for CVE-2026-33066 enabled the Lute HTML sanitizer, but the sanitizer does not block iframe tags, and its URL-prefix blocklist does not...

Cross-site Scripting (XSS)

Overview Affected versions of this package are vulnerable to Cross-site Scripting XSS through incomplete sanitization of the README rendering process in the marketplace UI. An attacker can execute arbitrary scripts in the Electron context with full application privileges by embedding an iframe ta...

CVE-2026-40322

SiYuan is an open-source personal knowledge management system. In versions 3.6.3 and below, Mermaid diagrams are rendered with securityLevel set to "loose", and the resulting SVG is injected into the DOM via innerHTML. This allows attacker-controlled javascript: URLs in Mermaid code blocks to...

CVE-2026-40922

SiYuan is an open-source personal knowledge management system. In versions 3.6.1 through 3.6.3, a prior fix for XSS in bazaar README rendering incomplete fix for CVE-2026-33066 enabled the Lute HTML sanitizer, but the sanitizer does not block iframe tags, and its URL-prefix blocklist does not...

CVE-2026-40922 SiYuan: Incomplete sanitization of bazaar README allows stored XSS via iframe srcdoc (incomplete fix for CVE-2026-33066)

SiYuan is an open-source personal knowledge management system. In versions 3.6.1 through 3.6.3, a prior fix for XSS in bazaar README rendering incomplete fix for CVE-2026-33066 enabled the Lute HTML sanitizer, but the sanitizer does not block iframe tags, and its URL-prefix blocklist does not...

CVE-2026-40922 SiYuan: Incomplete sanitization of bazaar README allows stored XSS via iframe srcdoc (incomplete fix for CVE-2026-33066)

SiYuan is an open-source personal knowledge management system. In versions 3.6.1 through 3.6.3, a prior fix for XSS in bazaar README rendering incomplete fix for CVE-2026-33066 enabled the Lute HTML sanitizer, but the sanitizer does not block iframe tags, and its URL-prefix blocklist does not...

CVE-2026-40322

SiYuan is an open-source personal knowledge management system. In versions 3.6.3 and below, Mermaid diagrams are rendered with securityLevel set to "loose", and the resulting SVG is injected into the DOM via innerHTML. This allows attacker-controlled javascript: URLs in Mermaid code blocks to...

EUVD-2026-23330

SiYuan is an open-source personal knowledge management system. In versions 3.6.3 and below, Mermaid diagrams are rendered with securityLevel set to "loose", and the resulting SVG is injected into the DOM via innerHTML. This allows attacker-controlled javascript: URLs in Mermaid code blocks to...

CVE-2026-40322

SiYuan (open-source PIM) versions 3.6.3 and earlier render Mermaid diagrams with securityLevel=loose, injecting the SVG via innerHTML. This allows attacker-controlled javascript: URLs in Mermaid blocks to survive into output, and on desktop builds with Electron, windows created with nodeIntegrati...

CVE-2026-40322 SiYuan: Mermaid `javascript:` Link Injection Leads to Stored XSS and Electron RCE

SiYuan is an open-source personal knowledge management system. In versions 3.6.3 and below, Mermaid diagrams are rendered with securityLevel set to "loose", and the resulting SVG is injected into the DOM via innerHTML. This allows attacker-controlled javascript: URLs in Mermaid code blocks to...

CVE-2026-40322 SiYuan: Mermaid `javascript:` Link Injection Leads to Stored XSS and Electron RCE

SiYuan is an open-source personal knowledge management system. In versions 3.6.3 and below, Mermaid diagrams are rendered with securityLevel set to "loose", and the resulting SVG is injected into the DOM via innerHTML. This allows attacker-controlled javascript: URLs in Mermaid code blocks to...

CVE-2026-40322 SiYuan: Mermaid `javascript:` Link Injection Leads to Stored XSS and Electron RCE

SiYuan is an open-source personal knowledge management system. In versions 3.6.3 and below, Mermaid diagrams are rendered with securityLevel set to "loose", and the resulting SVG is injected into the DOM via innerHTML. This allows attacker-controlled javascript: URLs in Mermaid code blocks to...

SiYuan 安全漏洞

SiYuan is an open-source privacy-oriented personal knowledge management system developed by SiYuan itself. Versions of SiYuan 3.6.3 and earlier contained security vulnerabilities. These vulnerabilities stemmed from Mermaid charts being rendered with a relaxed security level, and the generated SVG...

PT-2026-33374

Name of the Vulnerable Software and Affected Versions SiYuan versions prior to 3.6.4 Description Mermaid diagrams are rendered with the securityLevel set to "loose", and the resulting SVG is injected into the DOM via innerHTML. This allows attacker-controlled javascript: URLs in Mermaid code bloc...

CVE-2026-40107 SiYuan Affected by Zero-Click NTLM Hash Theft and Blind SSRF via Mermaid Diagram Rendering

SiYuan is a personal knowledge management system. Prior to 3.6.4, SiYuan configures Mermaid.js with securityLevel: "loose" and htmlLabels: true. In this mode, tags with src attributes survive Mermaid's internal DOMPurify and land in SVG blocks. The SVG is injected via innerHTML with no secondary...

Arbitrary Code Injection

Overview Affected versions of this package are vulnerable to Arbitrary Code Injection in the handling of table captions during the rendering process. An attacker can execute arbitrary code with the privileges of the desktop client by syncing a crafted note containing malicious HTML or JavaScript ...

EUVD-2026-19973

SiYuan: Remote Code Execution in the Electron desktop client via stored XSS in synced table captions...

SiYuan: Remote Code Execution in the Electron desktop client via stored XSS in synced table captions

Summary A malicious note synced to another user can trigger remote code execution in the SiYuan Electron desktop client. The root cause is that table caption content is stored without safe escaping and later unescaped into rendered HTML, creating a stored XSS sink. Because the desktop renderer ru...

CVE-2026-34781

A flaw was found in Electron. An application that calls clipboard.readImage may be vulnerable to a denial of service DoS. If the system clipboard contains image data that fails to decode, the application can crash. This vulnerability does not lead to memory corruption or code execution. Mitigatio...