CVE-2026-110809 sgl-project SGLang Session Cleanup session_controller.py Session.create_req denial of service
Remote attackers can cause denial of service in SGLang via the Session.create_req function, requiring a patch for mitigation.
- 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-2026-110809?
CVE-2026-110809 is a medium-severity denial of service vulnerability in sgl-project SGLang, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A security vulnerability has been detected in sgl-project SGLang up to 0.5.19. Affected by this issue is the function Session.create_req of the file python/sglang/srt/session/session_controller.py of the component Session Cleanup. Such manipulation leads to denial of service. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. The pull request to fix this issue awaits acceptance.
Weakness: CWE-404
Which versions are affected by CVE-2026-110809?
How do I fix CVE-2026-110809?
No fix has been published for CVE-2026-110809 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-2026-110809 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-110809 exists.
Sources
Also known as GHSA-cq8f-cv6m-8vvq.