CVE-2026-34585SiYuan is a personal knowledge management system.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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SiYuan is a personal knowledge management system. Prior to version 3.6.2, a vulnerability allows crafted block attribute values to bypass server-side attribute escaping when an HTML entity is mixed with raw special characters. An attacker can embed a malicious IAL value inside a .sy document, package it as a .sy.zip, and have the victim import it through the normal Import -> SiYuan .sy.zip workflow. Once the note is opened, the malicious attribute breaks out of its original HTML context and injects an event handler, resulting in stored XSS. In the Electron desktop client, this XSS reaches remote code execution because injected JavaScript runs with access to Node/Electron APIs. This issue has been patched in version 3.6.2.
- CVSS
- 8.2 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-79, CWE-94
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
b3log siyuan b3log:siyuan | before 3.6.2 | NVD |
References
- https://github.com/siyuan-note/siyuan/issues/17246issue-tracking
- https://github.com/siyuan-note/siyuan/releases/tag/v3.6.2release-notes
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-ff66-236v-p4fgexploit, vendor-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.