CVE-2026-73050 SiYuan before v3.7.4 Stored XSS via select option color
Attackers can execute arbitrary JavaScript in SiYuan by injecting malicious code into select option color fields, affecting users viewing compromised databases.
- 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-2026-73050?
CVE-2026-73050 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 versions before v3.7.4 fail to validate or escape the color field in attribute-view select options, allowing stored cross-site scripting through eight unescaped render sites. Attackers can inject event-handler attributes by including quotation marks in the color value, executing arbitrary JavaScript when viewing databases containing the malicious select field.
Weakness: CWE-79
Which versions are affected by CVE-2026-73050?
How do I fix CVE-2026-73050?
No fix has been published for CVE-2026-73050 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-2026-73050 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73050 exists.
Sources
Also known as GHSA-cx3q-5hjf-hw39.