CVE-2026-52852 Traccar: Uncontrolled Infinite Loop DoS via Group Parent Cycle
An authenticated user can cause a denial of service by creating cyclic group hierarchies that trigger infinite loops during report generation.
- 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-2026-52852?
CVE-2026-52852 is a medium-severity denial of service vulnerability in traccar, published on 17 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Traccar is an open source GPS tracking system. Prior to 6.14.0, an authenticated user with permission to manage groups and request reports can create a cyclic group-parent hierarchy and request a trips or stops report for a device in that hierarchy. org.traccar.api.resource.GroupResource permits the parent cycle, while org.traccar.helper.model.AttributeUtil.lookup follows group parents without cycle detection, a visited set, or a depth limit. The storage-backed lookup reached through TripsConfig. and ReportUtils.slowTripsAndStops never terminates, pins a Jetty worker at high CPU after the client disconnects, and can exhaust the web/API worker pool when requests are repeated. The position-ingestion cache-backed path is not part of the confirmed affected scope. This issue is fixed in 6.14.0.
Weakness: CWE-674
Which versions are affected by CVE-2026-52852?
How do I fix CVE-2026-52852?
No fix has been published for CVE-2026-52852 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-2026-52852 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-52852 exists.
Sources
Also known as GHSA-6qh3-234v-r254.