CVE-2026-109229: Improper Handling of Highly Compressed Data (Data Amplification) in sgl-project sglang
Description
SGLang versions up to 0.5.21 have a denial of service vulnerability caused by disabling Pillow's decompression bomb protection. This occurs because Image.MAX_IMAGE_PIXELS is set to None in NanoNemotronVLImageProcessor, allowing remote attackers to submit small, highly compressed images with very large dimensions. This can exhaust worker memory during image decoding, leading to denial of service.
CVSS v4.0
Score 8.7high
Affected software
sgl-project
sglang
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-109229 is a denial of service vulnerability in SGLang through version 0.5.21. The vulnerability arises because the NanoNemotronVLImageProcessor disables Pillow's decompression bomb protection by setting Image.MAX_IMAGE_PIXELS to None process-wide. This allows remote attackers to submit small but highly compressed images with huge pixel dimensions to the generic image loader, which exhausts worker memory during decompression and causes a denial of service condition.
Potential Impact
Remote attackers can cause denial of service by exhausting memory resources during image decompression. This impacts availability of the affected system or service running SGLang up to version 0.5.21. There is no indication of privilege escalation, data disclosure, or code execution from the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted images or implement external controls to limit image size and decompression resource usage.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-12T13:46:33.687Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6accec5f2cdf04f6569f8108
Added to database: 10/12/2026, 14:19:11 UTC
Last enriched: 10/12/2026, 14:33:22 UTC
Last updated: 10/12/2026, 21:47:18 UTC
Views: 14
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