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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| sgl-project | sglang | ≤ 0.5.21 | — |
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