CVE-2026-100645 SiYuan 3.7.0 before 3.8.4 Stored XSS via Gallery Kanban
Attackers can execute arbitrary commands via stored XSS in SiYuan's gallery and kanban renderers when nodeIntegration is enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-100645?
CVE-2026-100645 is a high-severity cross-site scripting vulnerability in siyuan-note siyuan, published on 26 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
SiYuan versions 3.7.0 before 3.8.4 contain a stored cross-site scripting vulnerability in gallery and kanban database renderers where field descriptions are not escaped in aria-label attributes. In the Electron desktop app with nodeIntegration enabled, attackers can inject JavaScript that calls Node.js child_process APIs to execute arbitrary commands with user privileges.
Weakness: CWE-79
Which versions are affected by CVE-2026-100645?
How do I fix CVE-2026-100645?
No fix has been published for CVE-2026-100645 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-100645 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100645 exists.
Sources
Also known as GHSA-556j-q8c8-qqg3, GHSA-rqqw-4x86-32vh.