{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.59.0"
              },
              {
                "fixed": "0.81.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "4278b9c215dceef604573ab62fe0d51343670d07"
            },
            {
              "fixed": "be170f756f08617953a0f029daf11fef1bf41c67"
            }
          ],
          "repo": "https://github.com/datamodel-code-generator/datamodel-code-generator",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-77xj-x4rm-935c"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-22",
      "CWE-73"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107377.json"
  },
  "details": "datamodel-code-generator generates Python data models from schema definitions. From 0.59.0 until 0.81.0, an attacker-controlled Protobuf schema can supply absolute or parent-directory paths captured by WEAK_IMPORT_PATTERN and consumed by _write_missing_weak_imports in src/datamodel_code_generator/parser/protobuf.py. Exploitation requires a victim or automated job to process the attacker-controlled schema with Protobuf input support, which requires the grpcio-tools package. The paths escape the weak_imports temporary directory before protoc runs, allowing creation of directory trees and new files or overwrite of existing writable files with a generated Protobuf syntax declaration. The effect persists when later Protobuf compilation fails. The written content is limited to a proto2 or proto3 syntax declaration, and direct arbitrary code execution has not been demonstrated. This issue is fixed in version 0.81.0.",
  "id": "CVE-2026-107377",
  "modified": "2026-10-09T02:30:45.643498104Z",
  "published": "2026-10-08T17:55:22.595Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107377.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/datamodel-code-generator/datamodel-code-generator/commit/5e94b8f4203198798ec66b8e48217f70af69a0dc"
    },
    {
      "type": "WEB",
      "url": "https://github.com/datamodel-code-generator/datamodel-code-generator/releases/tag/0.81.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/datamodel-code-generator/datamodel-code-generator/security/advisories/GHSA-77xj-x4rm-935c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107377"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "datamodel-code-generator: Protobuf weak-import path traversal allows files to be written outside the temporary directory"
}