{
  "id": "CVE-2026-42271",
  "url": "https://spydr.io/cve/CVE-2026-42271",
  "published": "2026-05-08T04:16:21.820Z",
  "modified": "2026-07-15T02:21:30.727Z",
  "score": 8.7,
  "severity": "high",
  "cvss_version": "4.0",
  "vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
  "score_source": "github.com",
  "epss": 0.9257,
  "epss_percentile": 0.99825,
  "exploited": true,
  "kev": {
    "added": "2026-06-08",
    "due": "2026-06-22",
    "action": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
    "ransomware": "Unknown",
    "name": "BerriAI LiteLLM Command Injection Vulnerability",
    "notes": "This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://github.com/BerriAI/litellm/security/advisories/GHSA-v4p8-mg3p-g94g ; https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable ; https://nvd.nist.gov/vuln/detail/CVE-2026-42271"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "BerriAI",
    "Red Hat"
  ],
  "products": [
    "BerriAI litellm",
    "Red Hat OpenShift AI 2.25",
    "Red Hat OpenShift AI 3.3",
    "Red Hat OpenShift AI 3.4",
    "Red Hat Exploit Intelligence",
    "Red Hat Ansible Automation Platform 2",
    "Red Hat OpenShift AI (RHOAI)"
  ],
  "cwes": [
    "CWE-77",
    "CWE-78"
  ],
  "description": "LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From version 1.74.2 to before version 1.83.7, two endpoints used to preview an MCP server before saving it — POST /mcp-rest/test/connection and POST /mcp-rest/test/tools/list — accepted a full server configuration in the request body, including the command, args, and env fields used by the stdio transport. When called with a stdio configuration, the endpoints attempted to connect, which spawned the supplied command as a subprocess on the proxy host with the privileges of the proxy process. The endpoints were gated only by a valid proxy API key, with no role check. Any authenticated user — including holders of low-privilege internal-user keys — could therefore run arbitrary commands on the host. This issue has been patched in version 1.83.7.",
  "status": "Analyzed",
  "score_type": "Secondary",
  "scores": {
    "cvss_v40": 8.7,
    "cvss_v31": 8.8,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable",
      "tags": [
        "Product",
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/BerriAI/litellm/security/advisories/GHSA-v4p8-mg3p-g94g",
      "tags": [
        "Mitigation",
        "Patch",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:27784",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:28960",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:30056",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://access.redhat.com/security/cve/CVE-2026-42271",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467924",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42271.json",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-42271",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42271",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}