What’s Vulnerable › Vulnerabilities

CVE-2026-65605: SiYuan before v3.7.2 Stored XSS to RCE via Attribute View

• Severity: critical (CVSS 9.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-23 · updated 2026-10-24
• Weakness: CWE-79

Description

SiYuan before v3.7.2 contains a stored cross-site scripting vulnerability in Attribute View (database) cell rendering. A Template column value is rendered as HTML via text/template without auto-escaping, and EscapeHTML is only applied when HasUnclosedHtmlTag returns true; because balanced self-closing tags such as <img> are skipped by that check, a payload like <img src=x onerror=...> is stored unescaped and later inserted into the page via innerHTML, executing when the database is viewed. Because the desktop renderer runs with nodeIntegration enabled, the injected script can reach require and escalate to arbitrary command execution.

Affected products

• siyuan-note siyuan: before 3.7.2 — fixed in 3.7.2

How to fix

Upgrade to a fixed version: siyuan-note siyuan 3.7.2. Check the vendor advisory for mitigations.

References

• https://github.com/siyuan-note/siyuan/commit/41f2861c87575ff5ac4b50a0520b1a4fe55b4a70
• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-pw5c-qhf3-jhwh
• https://www.vulncheck.com/advisories/siyuan-before-stored-xss-to-rce-via-attribute-view
• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-pw5c-qhf3-jhwh

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