Malicious code in my-private-pkg (PyPI)
Version 99.1.1 of my-private-pkg executes a custom setuptools install hook while a wheel is built. The hook launches my_private_pkg/index.py, which collects the current username, working directory, hostname, resolved local IP address, operating system, and machine architecture, then attempts to POST the resulting JSON to a hard-coded Webhook.site request collector. Dynamic analysis observed the wheel build spawn this script followed immediately by network activity. The package's public metadata describes it only as a private Python package and does not disclose the collection or transmission. --- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (d8008c5637dfae2dfc4162f1dd5152c5e90e03b0fc8593fda5055f44e9745b22) setup.py registers a custom install command (PostInstallCommand) that runs my_private_pkg/index.py automatically on `pip install`. That script gathers installer-side identifiers — os.getlogin(), socket.gethostname(), local IP address, os.getcwd(), platform.system() and platform.machine() — and POSTs them as JSON to a hardcoded collector URL at https://webhook.site/d4d1b01b-708a-40b9-b8c8-187eeecafeed. A duplicate of the exfiltration payload is shipped as vercel_runtime_python/index.py, and vercel_runtime_python/__init__.py contains the same PostInstallCommand wiring referencing my_private_pkg/index.py; the module name mimics Vercel's Python runtime. The package name and the internal vercel_runtime_python module name are consistent with
MAL-2026-17180
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:MAL-2026-17180
my-private-pkg
Source reference: /affected/0/package/name
- Affected versions
- 99.1.1
Source reference:
/affected/0/versions0.1.1Source reference:
/affected/0/versions99.11.2Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"package": {
"name": "my-private-pkg",
"purl": "pkg:pypi/my-private-pkg",
"ecosystem": "PyPI"
},
"versions": [
"99.1.1",
"0.1.1",
"99.11.2"
],
"database_specific": {
"cwes": [
{
"name": "Embedded Malicious Code",
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature."
},
{
"name": "Embedded Malicious Code",
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature."
},
{
"name": "Embedded Malicious Code",
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature."
},
{
"name": "Embedded Malicious Code",
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature."
}
],
"source": "https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/my-private-pkg/MAL-2026-17180.json",
"indicators": {
"evidence_files": [
{
"path": "setup.py",
"tlsh": "3e01bd47ce7593342c7243aa95962501e722166b1b00a48b30fe05185f73862851fbef",
"sha256": "8cd83903e488634d917bbfffe4c6cc989888004a7de19e35509885041df42a32"
},
{
"path": "vercel_runtime_python/index.py",
"tlsh": "5611cc7a8d618d41977a808ccc078092f2164b236b25fe6bbcfc066daf3000153b0df2",
"sha256": "df6d2c082b08ac77ebe3c6a8db9b2fd9dc607482631224fd120502de81191934"
}
],
"package_integrity": [
{
"hashes": {
"md5": "cb7f60550698225c587033bcf99024d7",
"sha256": "17d77e31dceb38fde6c20c70164515acf24e2e334f9d22858f771cce78594aa8",
"blake2b_256": "6120ed17fac654a5d8e73c68eb5e9ddebe7fa298fc85347e3d656eca67856e0a"
},
"filename": "my_private_pkg-99.1.1-py3-none-any.whl"
},
{
"hashes": {
"md5": "ba6ed08758ab5071a9d04458a21e05e0",
"sha256": "c23d1aefbf0580324d8a4b1caf5c862c7a4146c5c797d5dbc84bb5e37a9ddb4d",
"blake2b_256": "efb0b5cbed785b116759e99b6712106011d810418c9b388dace6d9426f34611b"
},
"filename": "my_private_pkg-99.1.1.tar.gz"
}
]
}
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #33434 · Revision 1
- Added to Heist Feed
- Publisher date