CVE-2026-66396SiYuan before v3.7.2 Stored XSS to RCE via title-img IAL
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 v3.7.2 fails to escape the title-img Individual Attribute List value when rendering Gallery and Kanban cover images, allowing stored cross-site scripting via unescaped style attribute interpolation. Attackers with editor permissions can inject onload handlers that execute arbitrary code in the Electron renderer with full Node.js access when victims open affected documents.
- CVSS
- 8.4 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/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 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
siyuan-note siyuan siyuan_note:siyuan (from the name) | before 3.7.2; 3.7.2 not affected | CNA record |
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-5rxg-wh59-mg34vendor-advisory
- https://www.vulncheck.com/advisories/siyuan-before-stored-xss-to-rce-via-title-img-ialthird-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.