CVE-2026-40322
CriticalSummary
SiYuan to otwartoźródłowy system zarządzania wiedzą osobistą. W wersjach 3.6.3 i starszych, diagramy Mermaid są renderowane z ustawionym securityLevel na 'luźny', co pozwala na wstrzyknięcie kontrolowanego przez atakującego kodu JavaScript do renderowanego wyjścia.
Risk Assessment
Na desktopowych wersjach używających Electron, włączenie nodeIntegration i wyłączenie contextIsolation umożliwia eskalację przechowywanego XSS do wykonania dowolnego kodu, gdy ofiara otworzy notatkę z złośliwym blokiem Mermaid.
Recommendation
Zaleca się aktualizację do wersji 3.6.4, w której ten problem został naprawiony, aby zminimalizować ryzyko ataków XSS.
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Original NVD description (English source)
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 survive into the rendered output. On desktop builds using Electron, windows are created with nodeIntegration enabled and contextIsolation disabled, escalating the stored XSS to arbitrary code execution when a victim opens a note containing a malicious Mermaid block and clicks the rendered diagram node. This issue has been fixed in version 3.6.4.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS