`datamodel-code-generator` vulnerable to code execution on import via unescaped `validators` entries in --extra-template-data

{
  "id": "eac1e4c754486f318c11fd0b0b9d0881571f6864721e91c7c97d5c36e3c3f07e",
  "url": "https://osv.dev/vulnerability/CVE-2026-54656",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "`datamodel-code-generator` vulnerable to code execution on import via unescaped `validators` entries in --extra-template-data",
    "summary": "datamodel-code-generator generates Pydantic v2 models, dataclasses, TypedDict, and msgspec.Struct from OpenAPI, JSON Schema, GraphQL, Avro, Protobuf, and raw JSON, YAML, or CSV. From 0.52.1 until 0.60.2, datamodel-code-generator interpolates validators from --extra-template-data in src/datamodel_code_generator/model/pydantic_v2/base_model.py through _process_validators into @field_validator decorators without safe validation, allowing Python code execution when the generated Pydantic v2 model is imported. This issue is fixed in version 0.60.2.",
    "evidence": "osv:CVE-2026-54656",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-54656",
      "aliases": [
        "CVE-2026-54656",
        "GHSA-8m8r-38jm-f355",
        "PYSEC-2026-3559"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/datamodel-code-generator/datamodel-code-generator",
              "type": "GIT",
              "events": [
                {
                  "introduced": "361fb5aa6a63ae570132daee0c587e633f62da6b"
                },
                {
                  "fixed": "e0ea4e45117acd41dcf6ae3a6639cc3f41b59045"
                },
                {
                  "fixed": "a43d02906111a2fdcaf13ee5b62eb2da85376f19"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:koxudaxi:datamodel-code-generator:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.52.1"
                      },
                      {
                        "fixed": "0.60.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "a43d02906111a2fdcaf13ee5b62eb2da85376f19"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "e0ea4e45117acd41dcf6ae3a6639cc3f41b59045"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "0.60.2"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.60.1",
            "0.60.0",
            "0.59.1",
            "0.59.0",
            "0.58.0",
            "0.57.0",
            "0.56.1",
            "0.56.0",
            "0.55.0",
            "0.54.1",
            "0.54.0",
            "0.53.0",
            "0.52.2",
            "0.52.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54656.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.172587593Z",
      "provider": "osv",
      "references": [
        "https://github.com/koxudaxi/datamodel-code-generator/releases/tag/0.60.2",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54656.json",
        "https://github.com/koxudaxi/datamodel-code-generator/security/advisories/GHSA-8m8r-38jm-f355",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-54656",
        "https://github.com/koxudaxi/datamodel-code-generator/commit/a43d02906111a2fdcaf13ee5b62eb2da85376f19"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-94"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54656.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-54656",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490739,
  "published_at": "2026-07-28T21:43:56.286+00:00"
}