CVE-2026-108942 Cross-site scripting in clarity-upscaler
Remote attackers can inject malicious scripts via the Description field in the Extra Networks Card Rendering component of clarity-upscaler.
- 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-2026-108942?
CVE-2026-108942 is a medium-severity cross-site scripting vulnerability in philz1337x clarity-upscaler, published on 13 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
A security flaw has been discovered in philz1337x clarity-upscaler up to cfbdb842c6c839c8e97741722b8cf9a4b7662d98. This impacts the function create_html_for_item of the file modules/ui_extra_networks.py of the component Extra Networks Card Rendering. The manipulation of the argument Description results in cross site scripting. The attack can be executed remotely. This product implements a rolling release for ongoing delivery, which means version information for affected or updated releases is unavailable. All versions in the repository are affected, as the codebase is based on AUTOMATIC1111/stable-diffusion-webui v1.7.0 code. Upstream AUTOMATIC1111/stable-diffusion-webui (v1.8.0, released March 1, 2024) contains the fix. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-108942?
How do I fix CVE-2026-108942?
No fix has been published for CVE-2026-108942 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-2026-108942 being exploited?
There is no known exploitation of CVE-2026-108942 in the wild and no public exploit code.
Sources
Also known as GHSA-66qr-3w6p-3g37.