Is CVE-2026-109227 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-109227?

CVE-2026-109227 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-109227

Description

SGLang through 0.5.21 contains an unbounded memory allocation vulnerability in preprocess_video in qwen_vl.py that decodes frames at full source resolution before applying max_pixels limits. Remote attackers can submit high-resolution videos to /v1/chat/completions on Qwen-VL deployments, and concurrent requests exhaust worker memory causing denial of service.