CVE-2026-108725 Cheshire Cat AI core through 2.0.23 Stored XSS via uploads plugin
Authenticated users can upload malicious HTML files to execute scripts in the application origin, potentially stealing administrator access tokens.
- 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-2026-108725?
CVE-2026-108725 is a medium-severity cross-site scripting vulnerability in cheshire-cat-ai core, published on 11 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
Cheshire Cat AI core through 2.0.23 contains a stored cross-site scripting vulnerability in the uploads plugin that allows authenticated users to upload HTML files via POST /uploads without type restrictions. Attackers can send the public GET /uploads/{path} URL to a signed-in victim, executing script in the application origin with the victim's access_token cookie, including administrators.
Weakness: CWE-79
Which versions are affected by CVE-2026-108725?
How do I fix CVE-2026-108725?
No fix has been published for CVE-2026-108725 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-2026-108725 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108725 exists.
Sources
Also known as GHSA-37wv-8fg5-p97x.