CVE-2026-109227

HighCVSS 7.5/10Last modified Oct 18, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-770

Affected software

Vendor	Product	Versions
sgl-project	sglang	<= 0.5.21

References

Timeline

Published: Oct 12, 2026
Last modified: Oct 18, 2026
NVD status: Deferred

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