Vulnerability · Published Sep 18, 2026 · Assigned by VulnCheck
CVE-2026-93922SiYuan through 3.8.4 Stored XSS via notebook names
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 through 3.8.4 renders notebook names as raw HTML in the Daily Note picker dialog without escaping, allowing stored cross-site scripting in the Electron renderer. Attackers can create notebooks with HTML payloads in names that execute JavaScript with Node.js access when the picker opens, enabling operating system command execution.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| siyuan-note | siyuan | 0 – through 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
- GitHub Security Advisory (GHSA-8c2m-33v9-vvqm) vendor-advisory
- https://github.com/siyuan-note/siyuan product
- https://github.com/siyuan-note/siyuan/blob/v3.8.4/app/src/util/mount.ts#L72 technical-description
- https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/model/file.go#L2446-L2454 technical-description
- VulnCheck Advisory: SiYuan through 3.8.4 Stored XSS via notebook names third-party-advisory