CVE-2026-73041
SiYuan before v3.7.4 Remote Code Execution via PDF Annotations
- State
- Published
- Severity
- 9.4 Critical
- Published
- Aug 15, 2026
- Updated
- Aug 17, 2026
- Reserved
- Aug 10, 2026
Description
SiYuan versions before v3.7.4 fail to validate or escape annotation fields written to disk by the setFileAnnotation endpoint. Attackers can inject malicious markup into annotation fields that execute as script in the PDF renderer with full Node.js access when a user opens an annotated PDF.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.4 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H | VulnCheck |
| 3.1 | 9.0 Critical | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
siyuansiyuan-note |
|
References
- GitHub Security Advisory (GHSA-fqpw-c3pj-w8g9)vendor-advisory
- VulnCheck Advisory: SiYuan before v3.7.4 Remote Code Execution via PDF Annotationsthird-party-advisory
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