CVE-2026-109229 SGLang through 0.5.21 Decompression Bomb DoS via NanoNemotronVLImageProcessor
Remote attackers can cause denial of service by submitting compressed images that exhaust memory due to disabled decompression bomb protections.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-109229?
CVE-2026-109229 is a high-severity denial of service vulnerability in sgl-project sglang, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-409
Which versions are affected by CVE-2026-109229?
How do I fix CVE-2026-109229?
No fix has been published for CVE-2026-109229 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-109229 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109229 exists.
Sources
Also known as GHSA-fqvf-j3pr-77v9.