CVE-2026-73042 SiYuan before v3.7.4 Remote Code Execution via Menu Metadata
Attackers can execute arbitrary code by injecting malicious HTML into menu metadata, exploiting Electron's insecure configuration 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-2026-73042?
CVE-2026-73042 is a critical cross-site scripting vulnerability in siyuan-note siyuan, published on 15 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 v3.7.4 fails to properly escape database menu metadata in HTML interpolation, allowing stored values to execute script when users open group, view, or field-edit menus. Attackers can inject markup through field descriptions or names that close containing elements and execute arbitrary code via event handlers, reaching Node built-ins due to Electron's insecure configuration.
Weakness: CWE-79
Which versions are affected by CVE-2026-73042?
How do I fix CVE-2026-73042?
No fix has been published for CVE-2026-73042 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-2026-73042 being exploited?
There is no known exploitation of CVE-2026-73042 in the wild and no public exploit code.
Sources
Also known as GHSA-v3h3-59vx-wx73.