XSS in Siyuan-Note Siyuan
CVE-2026-92985
SiYuan versions before 3.8.4 fail to escape bookmark labels imported from notebook files when rendering them in the dock tree. Attackers can craft malicious .sy notebook files with unescaped HTML in bookmark attributes that execute scripts in the Electron renderer with access to child_process for command execution.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (57.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/siyuan-note/siyuan/commit/6f093ebe50afc503e2a8b056164293054f8509e7 (patch)
- github.com/siyuan-note/siyuan (product)
- github.com/siyuan-note/siyuan/security/advisories/GHSA-jhfc-9mcq-8p8v (vendor-advisory)
- github.com/siyuan-note/siyuan/blob/v3.8.3/app/src/util/Tree.ts (technical-description)
- www.vulncheck.com/advisories/siyuan-before-3.8.4-cross-site-scripting-via-bookm… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-92985?
- CVE-2026-92985 is a high-severity vulnerability in Siyuan-Note Siyuan, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-09-17.
- How severe is CVE-2026-92985?
- High severity. CVSS v3 base score is 8.8 out of 10.