CVE-2026-54224 Denial of Service in UBB.threads
An authenticated attacker can cause a denial of service in UBB.threads by exhausting database resources through concurrent profile view requests.
- 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-2026-54224?
CVE-2026-54224 is a high-severity denial of service vulnerability in UBB.threads, published on 18 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
UBB.threads is vulnerable to Denial of Service (DoS). By sending multiple concurrent requests to view any user profile on instances with many registered users, an authenticated attacker can easily exhaust database resources and completely deny access to the application for other users. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 7.7.5 but may also affect other versions.
Weakness: CWE-405
Which versions are affected by CVE-2026-54224?
How do I fix CVE-2026-54224?
No fix has been published for CVE-2026-54224 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-2026-54224 being exploited?
There is no known exploitation of CVE-2026-54224 in the wild and no public exploit code.
Sources
Also known as GHSA-r4cc-xcx2-vp28.