CVE-2026-111984 AUTOMATIC1111 stable-diffusion-webui Card Builder ui_extra_networks.py create_item_html cross site scripting
Attackers can inject malicious scripts via filename arguments in the Card Builder, potentially executing code or bypassing security controls in Stable Diffusion WebUI.
- 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-2026-111984?
CVE-2026-111984 is a medium-severity cross-site scripting vulnerability in AUTOMATIC1111 stable-diffusion-webui, published on 18 Oct 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
A vulnerability has been found in AUTOMATIC1111 stable-diffusion-webui up to 1.10.1. This affects the function create_item_html of the file modules/ui_extra_networks.py of the component Card Builder. The manipulation of the argument filename leads to cross site scripting. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-111984?
How do I fix CVE-2026-111984?
No fix has been published for CVE-2026-111984 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-2026-111984 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111984 exists.
Sources
Also known as GHSA-39xx-5fr9-wx26.