vLLM from 0.10.1 before 0.31.0 forwards a request-controlled mm_processor_kwargs.max_patches value to the Hugging Face processor for Cohere2 Vision models without a server-side upper bound, causing quadratic CPU work during multimodal preprocessing. Remote clients can send small image chat-completion requests with large, varying max_patches values to bypass the LRU cache, exhaust preprocessing workers, and deny service to other clients.
Metrics
Affected Vendors & Products
Advisories
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Fixes
Solution
No solution given by the vendor.
Workaround
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References
History
Fri, 13 Nov 2026 09:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | vLLM from 0.10.1 before 0.31.0 forwards a request-controlled mm_processor_kwargs.max_patches value to the Hugging Face processor for Cohere2 Vision models without a server-side upper bound, causing quadratic CPU work during multimodal preprocessing. Remote clients can send small image chat-completion requests with large, varying max_patches values to bypass the LRU cache, exhaust preprocessing workers, and deny service to other clients. | |
| Title | vLLM 0.10.1 before 0.31.0 Cohere2 Vision DoS via max_patches | |
| First Time appeared |
Vllm
Vllm vllm |
|
| Weaknesses | CWE-400 | |
| CPEs | cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Vllm
Vllm vllm |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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MITRE
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-11-13T09:35:50.274Z
Reserved: 2026-11-10T21:30:16.910Z
Link: CVE-2026-126397
Vulnrichment
No data.
NVD
Status : Awaiting Analysis
Published: 2026-11-13T10:17:43.923
Modified: 2026-11-13T10:17:44.050
Link: CVE-2026-126397
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses