Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/siyuan-note/siyuan/commit/41f2861c87575ff5ac4b50a0520b1a4fe55
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-pw5c-qhf3-jhwh
- https://www.vulncheck.com/advisories/siyuan-before-stored-xss-to-rce-via-attribu
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-pw5c-qhf3-jhwh
FAQ
What is CVE-2026-65605?
CVE-2026-65605 is a vulnerability with a CVSS score of 9.6 (CRITICAL). 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-escapi...
How severe is CVE-2026-65605?
CVE-2026-65605 has been rated CRITICAL with a CVSS base score of 9.6/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-65605?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.