CVE-2026-86712
SiYuan before 3.8.2 Remote Code Execution via Clipboard
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
SiYuan before 3.8.2 trusts the attacker-writable text/siyuan clipboard MIME type and skips sanitization in the paste handler, allowing code execution in the Node-enabled desktop renderer. Attackers can craft malicious web pages that write to the clipboard, and when pasted into SiYuan, injected scripts execute with full Node.js access through the Electron main process.
| CWE | CWE-79 |
| Vendor | siyuan-note |
| Product | siyuan |
| Published | Sep 8, 2026 |
| Last Updated | Sep 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
siyuan-note / siyuan
0 < 3.8.2
References
github.com: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-9rr9-pxr4-gcgc github.com: https://github.com/siyuan-note/siyuan/commit/9ce660652de2ced26ec2d98a5a242cb0b8bb7273 github.com: https://github.com/siyuan-note/siyuan/releases/tag/v3.8.2 github.com: https://github.com/siyuan-note/siyuan/blob/v3.8.1/app/src/protyle/util/paste.ts github.com: https://github.com/siyuan-note/siyuan vulncheck.com: https://www.vulncheck.com/advisories/siyuan-before-3.8.2-remote-code-execution-via-clipboard
Credits
Siyang Wu