{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-109227", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-10-12T13:46:32.999Z", "datePublished": "2026-10-12T14:04:31.362Z", "dateUpdated": "2026-10-12T14:04:31.362Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-12T14:04:31.362Z" }, "datePublic": "2026-10-11T00:00:00.000Z", "title": "SGLang through 0.5.21 Memory Exhaustion DoS via Qwen-VL Video Preprocessing", "descriptions": [ { "lang": "en", "value": "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." } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "Allocation of Resources Without Limits or Throttling", "cweId": "CWE-770", "type": "CWE" } ] } ], "affected": [ { "vendor": "sgl-project", "product": "sglang", "defaultStatus": "unaffected", "packageURL": "pkg:pypi/sglang", "repo": "https://github.com/sgl-project/sglang", "collectionURL": "https://pypi.org/project/sglang", "versions": [ { "version": "0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "0.5.21" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:lmsys:sglang:*:*:*:*:*:*:*:*", "versionEndIncluding": "0.5.21" } ] } ] } ], "metrics": [ { "format": "CVSS", "cvssV4_0": { "version": "4.0", "vectorString": "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", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH" } }, { "format": "CVSS", "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH" } } ], "references": [ { "url": "https://github.com/sgl-project/sglang/issues/43710", "tags": [ "issue-tracking" ], "name": "GitHub Issue #43710" }, { "url": "https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/multimodal/processors/qwen_vl.py#L267-L306", "tags": [ "technical-description" ] }, { "url": "https://github.com/sgl-project/sglang", "tags": [ "product" ] }, { "name": "VulnCheck Advisory: SGLang through 0.5.21 Memory Exhaustion DoS via Qwen-VL Video Preprocessing", "tags": [ "third-party-advisory" ], "url": "https://www.vulncheck.com/advisories/sglang-through-0.5.21-memory-exhaustion-dos-via-qwen-vl-video-preprocessing" } ], "credits": [ { "lang": "en", "value": "Jiapeng Li", "type": "finder" }, { "lang": "en", "value": "Jiajia Liu", "type": "finder" }, { "lang": "en", "value": "Jiadai Wang", "type": "finder" } ], "x_generator": { "engine": "vulncheck-endgame" } } } }