{"id":"CVE-2026-109227","revision":null,"records":[{"revision":"0391aa412c9c4e518ab53ea1e9e5befd","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-109227","aliases":[],"title":"SGLang through 0.5.21 Memory Exhaustion DoS via Qwen-VL Video Preprocessing","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.","state":0,"publishedAt":"2026-10-12T14:04:31.362+00:00","modifiedAt":"2026-10-18T11:46:21.4+00:00","affected":[{"ecosystem":"https://pypi.org/project/sglang","name":"sglang","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"sgl-project\",\n                    \"product\": \"sglang\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:pypi/sglang\",\n                    \"repo\": \"https://github.com/sgl-project/sglang\",\n                    \"collectionURL\": \"https://pypi.org/project/sglang\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"0.5.21\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":8.7,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/sgl-project/sglang/issues/43710","https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/multimodal/processors/qwen_vl.py#L267-L306","https://github.com/sgl-project/sglang","https://www.vulncheck.com/advisories/sglang-through-0.5.21-memory-exhaustion-dos-via-qwen-vl-video-preprocessing"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109227","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-109227","identifiers":["CVE-2026-109227"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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