LMDeploy has Remote Code Execution by Pickle Deserialization via handle_zmq_recv in lmdeploy/lmdeploy/pytorch/disagg/conn/engine_conn.py

{
  "id": "6cfc8b865224dd9a1869664e92df4e52851d91ad9a57e7a84ae43284546e5f20",
  "url": "https://osv.dev/vulnerability/CVE-2025-66455",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "LMDeploy has Remote Code Execution by Pickle Deserialization via handle_zmq_recv in lmdeploy/lmdeploy/pytorch/disagg/conn/engine_conn.py",
    "summary": "LMDeploy is a toolkit for compressing, deploying, and serving large language models. Starting in version 0.9.2 and prior to version 0.16.0, LMDeploy's PyTorch DistServe/PD-disaggregation control plane used `recv_pyobj()` to deserialize messages received through a ZeroMQ PULL socket. PyZMQ implements `recv_pyobj()` using Python pickle deserialization, which can execute arbitrary code while reconstructing an object. The peer address used by the receiver was supplied through the `POST /distserve/p2p_connect` HTTP endpoint. An attacker who could reach an affected DistServe API server could cause the server to connect to an attacker-controlled ZeroMQ endpoint and deserialize a crafted pickle payload. API-key authentication is not enabled unless the operator explicitly configures it. As a result, affected DistServe deployments without API keys allowed unauthenticated remote code execution with the privileges of the LMDeploy serving process. This issue affects the PyTorch backend when PD-disaggregation/DistServe is enabled. Ordinary deployments that do not use the affected disaggregated-serving path do not expose this data flow. The fix was released in LMDeploy 0.16.0. Users who cannot upgrade immediately should prevent untrusted clients from reaching `/distserve/*` endpoints, restrict the DistServe HTTP and ZeroMQ control planes to trusted cluster networks, configure API-key authentication, and block arbitrary outbound ZeroMQ connections from serving nodes. These measures reduce ex",
    "evidence": "osv:CVE-2025-66455",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2025-66455",
      "aliases": [
        "CVE-2025-66455",
        "GHSA-2vh9-42vm-xmv2",
        "PYSEC-2026-4077"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/internlm/lmdeploy",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9098ae8c1abf35fdf81fb279d466c12766973aa7"
                },
                {
                  "fixed": "1208bf006bbac69f1f012ceafeeeb70f623b632c"
                },
                {
                  "fixed": "f05b4ad8bf2e2d84101a1d63b3c44fadd99223b2"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.9.2"
                      },
                      {
                        "fixed": "0.16.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "f05b4ad8bf2e2d84101a1d63b3c44fadd99223b2"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "1208bf006bbac69f1f012ceafeeeb70f623b632c"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v0.16.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.14.0",
            "v0.15.0",
            "0.14.0a2",
            "v0.13.0",
            "v0.12.3",
            "v0.12.2",
            "v0.12.1",
            "v0.12.0",
            "v0.11.1",
            "v0.11.0",
            "v0.10.2",
            "v0.10.1",
            "v0.10.0",
            "v0.9.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-66455.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.544287888Z",
      "provider": "osv",
      "references": [
        "https://github.com/InternLM/lmdeploy/releases/tag/v0.16.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66455.json",
        "https://github.com/InternLM/lmdeploy/security/advisories/GHSA-2vh9-42vm-xmv2",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-66455",
        "https://github.com/InternLM/lmdeploy/commit/f05b4ad8bf2e2d84101a1d63b3c44fadd99223b2"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-502"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66455.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-66455",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490992,
  "published_at": "2026-09-18T17:03:37.084+00:00"
}