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High severity · published Oct 12, 2026
CVE-2026-109229
SGLang through 0.5.21 Decompression Bomb DoS via NanoNemotronVLImageProcessor
7.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SG
sglang · sgl-project
through 0.5.21 · source: vendor
Affected product
SG
sglang
sgl-project
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109229
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109229
issue-tracking
https://github.com/sgl-project/sglang/issues/43707
technical-description
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
product
https://github.com/sgl-project/sglang
third-party-advisory
https://www.vulncheck.com/advisories/sglang-through-0.5.21-decompression-bomb-dos-via-nanonemotronvlimageprocessor
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