{
  "crds_version": "0.1",
  "kind": "base",
  "id": "crds:cve-2026-42271",
  "revision": 1,
  "title": "LiteLLM — any proxy key can run commands on the host",
  "summary": "Two preview endpoints in LiteLLM 1.74.2 through 1.83.6 accept a full Model Context Protocol (MCP) server definition and start the command inside it as a subprocess. Any valid proxy key, even a low-privilege one, therefore runs code on the host.",
  "source_type": "cve",
  "severity": "high",
  "cvss": {
    "score": 8.8,
    "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "version": "3.1"
  },
  "epss": 0.83594,
  "exploitation": {
    "known_exploited": true,
    "exploit_available": false,
    "attack_complexity": "low",
    "kev_added": "2026-06-08",
    "prerequisites": "Any valid proxy key, including a low-privilege internal-user key."
  },
  "remediation": {
    "patch_available": true,
    "fixed_in": [
      "LiteLLM 1.83.7"
    ]
  },
  "mitre_attack": [
    "T1059"
  ],
  "kill_chain": "execution",
  "recommended_action": "Upgrade LiteLLM to 1.83.7 or later now; rotate every proxy key issued before the upgrade and check the host for processes the proxy spawned.",
  "confidence": "high",
  "provenance": [
    {
      "fields": [
        "cvss",
        "exploitation.attack_complexity",
        "exploitation.exploit_available",
        "references",
        "published_at"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2026-42271",
      "retrieved_at": "2026-09-24T06:28:59.498Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "exploitation.known_exploited",
        "exploitation.kev_added"
      ],
      "source": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "retrieved_at": "2026-09-24T06:28:59.498Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "epss"
      ],
      "source": "https://api.first.org/data/v1/epss?cve=CVE-2026-42271",
      "retrieved_at": "2026-09-24T06:28:59.498Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "title",
        "summary",
        "severity",
        "remediation",
        "mitre_attack",
        "kill_chain",
        "recommended_action",
        "confidence",
        "tags",
        "exploitation.prerequisites"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2026-42271",
      "retrieved_at": "2026-09-24T06:28:59.498Z",
      "confidence": "high",
      "extractor": "claude-code"
    }
  ],
  "references": [
    {
      "type": "cve",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42271",
      "label": "NVD record"
    },
    {
      "type": "cisa",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "label": "CISA Known Exploited Vulnerabilities catalog"
    },
    {
      "type": "vendor_advisory",
      "url": "https://github.com/BerriAI/litellm/security/advisories/GHSA-v4p8-mg3p-g94g"
    },
    {
      "type": "writeup",
      "url": "https://access.redhat.com/errata/RHSA-2026:27784"
    },
    {
      "type": "writeup",
      "url": "https://access.redhat.com/errata/RHSA-2026:28960"
    }
  ],
  "published_at": "2026-05-08T04:16:21.820Z",
  "issued_at": "2026-09-24T06:28:59.498Z",
  "tags": [
    "litellm",
    "ai-gateway",
    "mcp",
    "command-injection",
    "kev"
  ]
}