What is CVE-2026-65605?

CVE-2026-65605 is a critical-severity vulnerability in Siyuan-note Siyuan, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2026-07-23.

How severe is CVE-2026-65605?

Critical severity. CVSS v3 base score is 9.6 out of 10.

XSS in Siyuan-note Siyuan

CVE-2026-65605

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…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Siyuan-note Siyuan — versions 0, 3.7.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-65605?: CVE-2026-65605 is a critical-severity vulnerability in Siyuan-note Siyuan, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2026-07-23.
How severe is CVE-2026-65605?: Critical severity. CVSS v3 base score is 9.6 out of 10.