Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck
CVE-2026-109229SGLang through 0.5.21 Decompression Bomb DoS via NanoNemotronVLImageProcessor
High 7.5
In plain English
A high-severity security flaw in sglang from sgl-project. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 56.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
SGLang through 0.5.21 contains a denial of service vulnerability that disables Pillow decompression bomb protection process-wide by setting Image.MAX_IMAGE_PIXELS to None in NanoNemotronVLImageProcessor. Remote attackers can submit small, highly compressed images with huge dimensions to the generic image loader, exhausting worker memory during decoding.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| sgl-project | sglang | 0 – through 0.5.21 |
Weakness: CWE-409 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- GitHub Issue #43707 issue-tracking
- https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/multimodal/processors/nano_nemotron_vl.py#L82 technical-description
- https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/utils/common.py#L1952-L1961 technical-description
- https://github.com/sgl-project/sglang product
- VulnCheck Advisory: SGLang through 0.5.21 Decompression Bomb DoS via NanoNemotronVLImageProcessor third-party-advisory