CVE-2026-92985 SiYuan before 3.8.4 Cross-Site Scripting via Bookmark Labels
Attackers can execute arbitrary code by tricking users into opening malicious notebook files with unescaped bookmark labels in SiYuan.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-92985?
CVE-2026-92985 is a high-severity cross-site scripting vulnerability in siyuan-note siyuan, published on 17 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
SiYuan versions before 3.8.4 fail to escape bookmark labels imported from notebook files when rendering them in the dock tree. Attackers can craft malicious .sy notebook files with unescaped HTML in bookmark attributes that execute scripts in the Electron renderer with access to child_process for command execution.
Weakness: CWE-79
Which versions are affected by CVE-2026-92985?
How do I fix CVE-2026-92985?
No fix has been published for CVE-2026-92985 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-2026-92985 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-92985 exists.
Sources
Also known as GHSA-29wc-8rjr-p9x2, GHSA-jhfc-9mcq-8p8v.