Vulnerability · Published Sep 17, 2026 · Assigned by VulnCheck
CVE-2026-92985SiYuan before 3.8.4 Cross-Site Scripting via Bookmark Labels
High 8.8
In plain English
A high-severity cross-site scripting in siyuan from siyuan-note. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.8%top 42.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| siyuan-note | siyuan | 0 – before 3.8.4 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- Patch Commit patch
- https://github.com/siyuan-note/siyuan product
- GitHub Security Advisory (GHSA-jhfc-9mcq-8p8v) vendor-advisory
- https://github.com/siyuan-note/siyuan/blob/v3.8.3/app/src/util/Tree.ts#L134 technical-description
- VulnCheck Advisory: SiYuan before 3.8.4 Cross-Site Scripting via Bookmark Labels third-party-advisory