CVE-2026-84887 simular-ai Agent-S Model-generated GUI Action Execution Workflow grounding.py denial of service
Remote attackers can cause denial of service in simular-ai Agent-S via the grounding.py component, with no vendor response or fix available.
- 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-2026-84887?
CVE-2026-84887 is a medium-severity denial of service vulnerability in simular-ai Agent-S, published on 2 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was identified in simular-ai Agent-S up to 0.3.2. Affected by this issue is some unknown functionality of the file grounding.py of the component Model-generated GUI Action Execution Workflow. The manipulation leads to denial of service. Remote exploitation of the attack is possible. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Weakness: CWE-404
Which versions are affected by CVE-2026-84887?
How do I fix CVE-2026-84887?
No fix has been published for CVE-2026-84887 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-2026-84887 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-84887 exists.
Sources
Also known as GHSA-3j2w-rmqf-7fcr.