Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck

CVE-2026-109225SGLang through 0.5.21 Memory Exhaustion DoS via /v1/audio/transcriptions Upload

High 7.5

In plain English

A high-severity resource allocation without limits in sglang from sgl-project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 62.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
sgl-project	sglang	0 – through 0.5.21

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

GitHub Issue #43709 issue-tracking
https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/entrypoints/http_server.py#L1847-L1871 technical-description
https://github.com/sgl-project/sglang product
VulnCheck Advisory: SGLang through 0.5.21 Memory Exhaustion DoS via /v1/audio/transcriptions Upload third-party-advisory