CVE-2026-92986 SiYuan before 3.8.4 Cross-Site Scripting via Document Title
Attackers can execute arbitrary code via XSS in document titles, exploiting Electron's child_process access 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-2026-92986?
CVE-2026-92986 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 before 3.8.4 renders document titles as HTML in the backlink dock tree without escaping markup characters. Attackers can set malicious titles through the rename API or crafted notebooks to execute scripts in the Electron renderer with access to child_process for command execution.
Weakness: CWE-79
Which versions are affected by CVE-2026-92986?
How do I fix CVE-2026-92986?
No fix has been published for CVE-2026-92986 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-2026-92986 being exploited?
There is no known exploitation of CVE-2026-92986 in the wild and no public exploit code.
Sources
Also known as GHSA-c5h9-g2c6-fxjw, GHSA-hqj9-5q65-f4g9.