mal-2026-3203
Vulnerability from ossf_malicious_packages
Published
2026-04-30 20:37
Modified
2026-04-30 20:37
Summary
Malicious code in buffparser (PyPI)
Details

-= Per source details. Do not edit below this line.=-

Source: kam193 (5cc891132b1216e9093bcdd4581373dc7f750f700c82347c28bd1dff079261d8)

Described as a utility for gaming, the code starts a reverse shell when using the exposed alledegdly parsing function.

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-04-buffparser

Reasons (based on the campaign):

  • The package contains code to create a reverse shell, allowing an attacker to execute any commands on the victim's machine.

  • action-hidden-in-lib-usage

Credits
Kamil Mańkowski (kam193) github.com/kam193 bad-packages.kam193.eu/
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "buffparser"
      },
      "versions": [
        "1.0.0"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "https://github.com/kam193",
        "https://bad-packages.kam193.eu/"
      ],
      "name": "Kamil Ma\u0144kowski (kam193)",
      "type": "REPORTER"
    }
  ],
  "database_specific": {
    "iocs": {
      "ips": [
        "91.149.191.134"
      ],
      "urls": [
        "https://raw.githubusercontent.com/57459N/test/refs/heads/main/ip.txt"
      ]
    },
    "malicious-packages-origins": [
      {
        "id": "pypi/2026-04-buffparser/buffparser",
        "import_time": "2026-04-30T21:26:33.336940086Z",
        "modified_time": "2026-04-30T20:37:00.337358Z",
        "sha256": "5cc891132b1216e9093bcdd4581373dc7f750f700c82347c28bd1dff079261d8",
        "source": "kam193",
        "versions": [
          "1.0.0"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: kam193 (5cc891132b1216e9093bcdd4581373dc7f750f700c82347c28bd1dff079261d8)\nDescribed as a utility for gaming, the code starts a reverse shell when using the exposed alledegdly parsing function.\n\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\n\nCampaign: 2026-04-buffparser\n\n\nReasons (based on the campaign):\n\n\n - The package contains code to create a reverse shell, allowing an attacker to execute any commands on the victim\u0027s machine.\n\n\n - action-hidden-in-lib-usage\n",
  "id": "MAL-2026-3203",
  "modified": "2026-04-30T20:37:00Z",
  "published": "2026-04-30T20:37:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://bad-packages.kam193.eu/pypi/package/buffparser"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in buffparser (PyPI)"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.