Malicious code in pafer (PyPI)

{
  "id": "9af0697e651c812092220bfdd8c07926021a22c580bf62570bc23943a74d7504",
  "url": "https://osv.dev/vulnerability/MAL-2026-17756",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Malicious code in pafer (PyPI)",
    "summary": "--- _-= Per source details. Do not edit below this line.=-_ ## Source: kam193 (a74b7c5b356a87fe0262954cbedbcc432497ab25edaccbade0ce9ce04b16a8c9) In this campaign, the main package (webreader) has an embeded pickle disguised as a config. A related dependency (pafer) contains code to load the pickle. During unpickling, malicious code embeded in the pickle file is automatically executed. It then establishes persistence via a PTH file and downloads the next stage payload. It finally acts like a RAT, allowing remote exfiltration and code execution. --- Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: 2026-10-webreader Reasons (based on the campaign): - rat - Downloads and executes a remote malicious script. - obfuscation - The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine. - abuses-pth - persistence - The malicious code is intentionally included in a dependency of the package - files-exfiltration",
    "evidence": "osv:MAL-2026-17756",
    "products": [
      {
        "name": {
          "value": "pafer",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.9.7",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.9.8",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "MAL-2026-17756",
      "aliases": [
        "MAL-2026-17756"
      ],
      "affected": [
        {
          "package": {
            "name": "pafer",
            "purl": "pkg:pypi/pafer",
            "ecosystem": "PyPI"
          },
          "versions": [
            "0.9.7",
            "0.9.8"
          ],
          "database_specific": {
            "source": "https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/pafer/MAL-2026-17756.json"
          }
        }
      ],
      "modified": "2026-10-20T14:30:03.724041547Z",
      "provider": "osv",
      "references": [
        "https://bad-packages.kam193.eu/pypi/package/pafer"
      ],
      "provider_metadata": {
        "iocs": {
          "urls": [
            "https://api.npoint.io/40e32d283a9d97e59252/a"
          ],
          "domains": [
            "frjmzbjbhwvtdnsuodmu.supabase.co"
          ]
        },
        "malicious-packages-origins": [
          {
            "id": "pypi/2026-10-webreader/pafer",
            "sha256": "a74b7c5b356a87fe0262954cbedbcc432497ab25edaccbade0ce9ce04b16a8c9",
            "source": "kam193",
            "versions": [
              "0.9.7",
              "0.9.8"
            ],
            "import_time": "2026-10-10T11:40:44.044102873Z",
            "modified_time": "2026-10-10T11:11:35.029137Z"
          },
          {
            "id": "pypi/2026-10-webreader/pafer",
            "sha256": "996e28750a2dcc9675967fd2694c758a684cf4c0d451e4b764cfb4129ce80645",
            "source": "kam193",
            "versions": [
              "0.9.7",
              "0.9.8"
            ],
            "import_time": "2026-10-20T14:18:31.999033988Z",
            "modified_time": "2026-10-10T11:11:35.029137Z"
          }
        ]
      }
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 389092,
  "published_at": "2026-10-10T11:11:35+00:00"
}