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CVE-2026-66396

SiYuan before v3.7.2 Stored XSS to RCE via title-img IAL

CVSS 4.0 9.3 CRITICALCVSS 3.1 8.4 HIGHCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-66396

Published

SiYuan before v3.7.2 fails to escape the title-img Individual Attribute List value when rendering Gallery and Kanban cover images, allowing stored cross-site scripting via unescaped style attribute interpolation. Attackers with editor permissions can inject onload handlers that execute arbitrary code in the Electron renderer with full Node.js access when victims open affected documents.

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Affected versions, risk and source history

Exploitation and risk

Source status

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Risk history

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Advisory history

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23 Oct 2026 15:48:27 UTC

SiYuan before v3.7.2 Stored XSS to RCE via title-img IAL

cve-program · CVE-2026-66396 · Published

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 13 Nov 09:00 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current

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