CVE-2026-90821 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Crafty Controller
Remote authenticated attackers can execute stored XSS via malicious Webhook URL input in Crafty Controller, potentially compromising user sessions.
- 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-2026-90821?
CVE-2026-90821 is a medium-severity cross-site scripting vulnerability in Arcadia Technology, LLC Crafty Controller, published on 16 Oct 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
An input neutralization vulnerability in the Webhook URL form field component of Crafty Controller allows a remote, authenticated attacker to perform stored XSS via malicious form input
Weakness: CWE-79
Which versions are affected by CVE-2026-90821?
How do I fix CVE-2026-90821?
No fix has been published for CVE-2026-90821 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-2026-90821 being exploited?
There is no known exploitation of CVE-2026-90821 in the wild and no public exploit code.
Sources
Also known as GHSA-v36h-wgjh-vc9p.