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CVE details

CVE-2026-126397

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.

Score
8.7 high
Published
2026-11-13
Links
NVD · cve.org · Report wrong data

Matched ports (1)

PortPackageVersionStatusMaintainer
misc/py-vllmpy312-vllm0.20.2_1unaddressedyuri@FreeBSD.org

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No CPE in the port Makefile

misc/py-vllm (CPE matched by the package name) has no USES=cpe. The CVE was matched through a CPE from another source, so the package and the version range may belong to a different product. Check the CVE record before using this entry.

  <vuln vid="FIXME (make newentry)">
    <topic>py312-vllm -- FIXME</topic>
    <affects>
      <package>
	<name>py312-vllm</name>
	<range><ge>0.10.1</ge><lt>0.31.0</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>CVE-2026-126397: 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.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-126397</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-126397</url>
    </references>
    <dates>
      <discovery>2026-11-13</discovery>
      <entry>2026-11-13</entry>
    </dates>
  </vuln>