CVE-2026-109227 — SGLang through 0.5.21 Memory Exhaustion DoS via Qwen-VL Video Preprocessing
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_p…
Published: 2026-10-12 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7