CVE-2026-86712SiYuan before 3.8.2 Remote Code Execution via Clipboard
Updated under an hour ago ()
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It affects siyuan-note siyuan. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
siyuan-note siyuan siyuan_note:siyuan (from the name) | before 3.8.2 | CNA record |
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-9rr9-pxr4-gcgcvendor-advisory
- https://github.com/siyuan-note/siyuan/commit/9ce660652de2ced26ec2d98a5a242cb0b8bb7273patch
- https://github.com/siyuan-note/siyuan/releases/tag/v3.8.2release-notes
- https://github.com/siyuan-note/siyuan/blob/v3.8.1/app/src/protyle/util/paste.tstechnical-description
- https://github.com/siyuan-note/siyuanproduct
- https://www.vulncheck.com/advisories/siyuan-before-3.8.2-remote-code-execution-via-clipboardthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.