CVE-2026-73053 SiYuan before v3.7.4 Cross-Site Scripting via unicode2Emoji
Attackers can execute arbitrary code on the host system via crafted document icons in SiYuan when Node integration is enabled.
- 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-2026-73053?
CVE-2026-73053 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 contain a cross-site scripting vulnerability in the unicode2Emoji function that fails to sanitize codepoint branch output. Attackers can craft document icons with hex-encoded markup that executes in the renderer with Node integration enabled, achieving arbitrary code execution on the host system.
Weakness: CWE-79
Which versions are affected by CVE-2026-73053?
How do I fix CVE-2026-73053?
No fix has been published for CVE-2026-73053 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-2026-73053 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73053 exists.
Sources
Also known as GHSA-qh5w-p4pr-mhpj.