CVE-2026-66396: SiYuan before v3.7.2 fails to escape the title-img Individual Attribute List value when rendering Gallery and Kanban cov…
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.
- Published by source
- 2026-07-27
- First seen by Reality Radar
- 2026-10-24
- Last verified
- 2026-10-24
What the official notice says
Risk: critical severity (CVSS 9.3)
Is this affecting you?
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Sources
- NIST National Vulnerability Database Tier A · official published 2026-07-27
Evidence ledger
Every piece of evidence we store is appended to a public hash chain, so later edits are detectable. Anyone can re-verify it.
| Entry | Kind | Observed | Evidence hash | Entry hash |
|---|---|---|---|---|
| #1591 | new | 2026-10-24 | ebcff9892fcc…f05349 | d8723c9a4683…35d141 |
Chain head: #1609 a9149670ca39…bb921c