CVE-2026-56255 Capgo - Denial of Service via Unlimited Demo App Creation
Authenticated users can cause denial of service by repeatedly creating unlimited demo applications due to missing rate limits.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-56255?
CVE-2026-56255 is a medium-severity denial of service vulnerability in Capgo, published on 22 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Capgo before 12.128.2 contains a denial of service vulnerability in the POST /app/demo endpoint that allows authenticated users with org write permissions to create unlimited demo applications without rate limiting or quota enforcement. Attackers can repeatedly invoke this endpoint to generate approximately 138 database write operations per request, causing degraded performance, increased costs, and potential service instability.
Weakness: CWE-770
Which versions are affected by CVE-2026-56255?
How do I fix CVE-2026-56255?
No fix has been published for CVE-2026-56255 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-56255 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56255 exists.
Sources
Also known as GHSA-q2xx-6h9x-43fw.