High 7.5Published Oct 12, 2026

CVE-2026-109227SGLang through 0.5.21 Memory Exhaustion DoS via Qwen-VL Video Preprocessing

Updated under an hour ago (Oct 28, 2026, 1:23 PM ET)

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It affects sgl-project sglang. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.42%, higher than 36% of scored CVEs.

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Every CVE for sgl-project sglang

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.42% (percentile 36)
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Oct 18, 2026
First seen by InfoSec Signals: Oct 12, 2026

Affected products

Affected products

sgl-project sglang sgl_project:sglang (from the name)	through 0.5.21	CNA record

References

References

https://github.com/sgl-project/sglang/issues/43710	issue-tracking
https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/multimodal/processors/qwen_vl.py#L267-L306	technical-description
https://github.com/sgl-project/sglang	product
https://www.vulncheck.com/advisories/sglang-through-0.5.21-memory-exhaustion-dos-via-qwen-vl-video-preprocessing	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.