Description
SGLang through 0.5.21 contains an unbounded memory allocation vulnerability that allows unauthenticated remote attackers to exhaust memory by uploading oversized files to /v1/audio/transcriptions. Attackers can send concurrent large multipart uploads, which are fully read into memory before validation, to crash the HTTP/tokenizer worker and deny service.
Published: 2026-10-12
Score: 8.7 High
EPSS: n/a
KEV: No
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Mon, 12 Oct 2026 14:15:00 +0000

Type Values Removed Values Added
Description SGLang through 0.5.21 contains an unbounded memory allocation vulnerability that allows unauthenticated remote attackers to exhaust memory by uploading oversized files to /v1/audio/transcriptions. Attackers can send concurrent large multipart uploads, which are fully read into memory before validation, to crash the HTTP/tokenizer worker and deny service.
Title SGLang through 0.5.21 Memory Exhaustion DoS via /v1/audio/transcriptions Upload
First Time appeared Lmsys
Lmsys sglang
Weaknesses CWE-770
CPEs cpe:2.3:a:lmsys:sglang:*:*:*:*:*:*:*:*
Vendors & Products Lmsys
Lmsys sglang
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, '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'}

Subscriptions

Lmsys Sglang
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-12T14:04:29.986Z

Reserved: 2026-10-12T13:46:26.547Z

Link: CVE-2026-109225

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-12T14:17:11.580

Modified: 2026-10-12T14:17:11.700

Link: CVE-2026-109225

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses