CVE-2026-100675 stoatchat before 0.15.5 Denial of Service via mass mentions
Authenticated users can crash acknowledgement workers via crafted role-mention messages, disabling notifications until restart.
- 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-2026-100675?
CVE-2026-100675 is a high-severity denial of service vulnerability in stoatchat, published on 26 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
stoatchat versions before 0.15.5 contain a denial of service vulnerability in the acknowledgement worker that processes mass mention messages. Authenticated users can send five crafted role-mention messages to terminate all acknowledgement workers, disabling push notifications and mention badges deployment-wide until the API process restarts.
Weakness: CWE-248
Which versions are affected by CVE-2026-100675?
How do I fix CVE-2026-100675?
No fix has been published for CVE-2026-100675 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-2026-100675 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100675 exists.
Sources
Also known as GHSA-5gq6-v4cf-3qq8, GHSA-gjgj-9pm3-6hxg.