CVE-2026-112083 sgl-project SGLang Weight Exporter weight_exporter.py WeightExporter.send_weights_to_remote_instance denial of service
Remote attackers can cause denial of service in SGLang by manipulating the group_name argument in the weight exporter.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-112083?
CVE-2026-112083 is a medium-severity denial of service vulnerability in sgl-project SGLang, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A security flaw has been discovered in sgl-project SGLang up to 0.5.19. Affected is the function WeightExporter.send_weights_to_remote_instance of the file python/sglang/srt/model_executor/model_runner_components/weight_exporter.py of the component Weight Exporter. Performing a manipulation of the argument group_name results in denial of service. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The pull request to fix this issue awaits acceptance.
Weakness: CWE-404
Which versions are affected by CVE-2026-112083?
How do I fix CVE-2026-112083?
No fix has been published for CVE-2026-112083 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-2026-112083 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-112083 exists.
Sources
Also known as GHSA-hqw5-mw82-chh2.