{"schema":"threatline.record/2","record":{"id":"CVE-2026-109227","aliases":[],"summary":"SGLang through 0.5.21 Memory Exhaustion DoS via Qwen-VL Video Preprocessing","details":"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.","categories":["Unclassified"],"product":"sglang","vendor":"sgl-project","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109227","source_modified_at":"2026-10-18T11:46:21.400Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"sglang","vendor":"sgl-project","versions":[{"version":"0","status":"affected","versionType":"semver","lessThanOrEqual":"0.5.21"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00422,"percentile":0.35477,"score_date":"2026-10-23"},"published_at":"2026-10-12T14:04:31.362Z","modified_at":"2026-10-18T11:46:21.400Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-109227","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-18T11:46:21.400Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-109227","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/sgl-project/sglang/issues/43710","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/multimodal/processors/qwen_vl.py#L267-L306","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/sgl-project/sglang","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/sglang-through-0.5.21-memory-exhaustion-dos-via-qwen-vl-video-preprocessing","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-18T11:46:17.742988Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-18T11:46:21.400Z","content_hash":"92405ec2c526d26836194d7cf40b45a767969550c72cfbe27436669fec7d9796"}}