CVE-2026-109227CWE-770denial-of-service

CVE-2026-109227

High · published October 12, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
35.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00422 · 35.5th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-10-12T18:17Z
References (5)
https://github.com/sgl-project/sglang · [email protected]https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/multimodal/processors/qwen_vl.py#L267-L306 · [email protected]https://github.com/sgl-project/sglang/issues/43710 · [email protected]https://www.vulncheck.com/advisories/sglang-through-0.5.21-memory-exhaustion-dos-via-qwen-vl-video-preprocessing · [email protected]https://github.com/sgl-project/sglang/issues/43710 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 14 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 12 OCT 14:04Z
    SGLang through 0.5.21 Memory Exhaustion DoS via Qwen-VL Video Preprocessing
    cvelistv5
  • 12 OCT 14:04Z
    SGLang through 0.5.21 Memory Exhaustion DoS via Qwen-VL Video Preprocessing
    cvelistv5