Vulnerability · Published Sep 17, 2026 · Assigned by VulnCheck
CVE-2026-92986SiYuan before 3.8.4 Cross-Site Scripting via Document Title
High 8.8
In plain English
A high-severity cross-site scripting in siyuan from siyuan-note. There are no confirmed reports of exploitation so far. 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: none
Attack toolingNoneno public tooling known
Official description
SiYuan before 3.8.4 renders document titles as HTML in the backlink dock tree without escaping markup characters. Attackers can set malicious titles through the rename API or crafted notebooks to 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-c5h9-g2c6-fxjw) 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 Document Title third-party-advisory