CVE-2026-73037 Next AI Draw.io 0.2.1 - 0.4.16 Reflected XSS via unsanitized mcp query parameter
Attackers can execute arbitrary JavaScript via a malicious URL to steal diagram sessions and API data from Next AI Draw.io users.
- 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-2026-73037?
CVE-2026-73037 is a medium-severity cross-site scripting vulnerability in DayuanJiang next-ai-draw-io, published on 13 Aug 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
Next AI Draw.io 0.2.1 through 0.4.16 contains a reflected cross-site scripting vulnerability in the mcp query parameter that is interpolated without escaping into HTML and JavaScript. Attackers can craft malicious URLs to execute arbitrary JavaScript in the localhost origin, enabling exfiltration of diagram sessions and API data.
Weakness: CWE-79
Which versions are affected by CVE-2026-73037?
How do I fix CVE-2026-73037?
No fix has been published for CVE-2026-73037 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-2026-73037 being exploited?
There is no known exploitation of CVE-2026-73037 in the wild and no public exploit code.
Sources
Also known as GHSA-7wvw-5p69-5396.