CVE-2026-126397

{
  "etk_id": "ETK-2026-4372",
  "cve_id": "CVE-2026-126397",
  "display_id": "CVE-2026-126397",
  "ghsa_id": "GHSA-9g3c-x747-c6wr",
  "euvd_id": "EUVD-2026-125168",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Unbounded image patch parameter denial of service in vLLM",
  "summary": "vLLM versions 0.10.1 through 0.30.x are affected when Cohere2 Vision multimodal processing is enabled. A remote client able to submit image chat-completion requests can cause excessive preprocessing CPU consumption and impair availability for other users.",
  "mitigation": "Upgrade vLLM to version 0.31.0. Until upgrading, restrict untrusted access to multimodal chat-completion endpoints that serve Cohere2 Vision models.",
  "vendor": "vllm-project",
  "product": "vllm",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0.10.1, < 0.31.0"
      ],
      "ecosystem": "pip",
      "fixed_versions": [
        "0.31.0"
      ],
      "package_name": "vllm",
      "purl": "pkg:pypi/vllm"
    }
  ],
  "cwes": [
    400
  ],
  "cvss_score": 8.7,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 58.83540908333333,
  "t0_at": "2026-11-13T09:35:50.274000+00:00",
  "signals": {
    "check": {
      "at": "2026-11-13T11:16:21.214499+00:00",
      "days": 0.06980255207175926,
      "is_lower_bound": false,
      "measured_at": "2026-11-13T09:35:50.274000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-11-13T09:35:50.274000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-13T09:35:50.274000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-126397"
    }
  }
}