CVE-2026-82653 SiYuan before v3.8.1 Stored XSS via confirmDialog
Attackers can execute arbitrary scripts in users' browsers by submitting malicious package or notebook names in SiYuan.
- 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-2026-82653?
CVE-2026-82653 is a critical cross-site scripting vulnerability in siyuan-note siyuan, published on 30 Aug 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 before v3.8.1 contains a stored cross-site scripting vulnerability in confirmDialog() where unescaped package names and notebook names are interpolated directly into innerHTML assignments. Attackers can submit malicious bazaar packages with HTML/script payloads in the name field that execute in users' browsers when uninstalling packages or unlocking encrypted notebooks.
Weakness: CWE-79
Which versions are affected by CVE-2026-82653?
How do I fix CVE-2026-82653?
No fix has been published for CVE-2026-82653 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-2026-82653 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82653 exists.
Sources
Also known as GHSA-hvwp-43j9-4xgf, GHSA-pxmq-4h62-hcr8.