CVE-2026-109228 SGLang through 0.5.21 Resource Budget Bypass via GLM-V Video Parameters
Remote attackers can exhaust worker memory by overriding video processing limits in SGLang, causing a denial of service.
- 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-2026-109228?
CVE-2026-109228 is a high-severity denial of service vulnerability in sgl-project sglang, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SGLang through 0.5.21 contains a resource budget bypass vulnerability that allows remote attackers to override GLM-V video processing limits by supplying fps, max_frames, max_tokens_per_frame and max_image_tokens in the video_url object. Attackers can set these values arbitrarily high so glm4v.py decodes every frame of high-resolution video at full size, exhausting worker memory and denying service.
Weakness: CWE-770
Which versions are affected by CVE-2026-109228?
How do I fix CVE-2026-109228?
No fix has been published for CVE-2026-109228 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-2026-109228 being exploited?
There is no known exploitation of CVE-2026-109228 in the wild and no public exploit code.
Sources
Also known as GHSA-2mhj-6r3c-c9xj.