Summary
flax v0.12.6 was classified as CRITICAL RISK with a risk score of 671. Sigil detected 56 findings across 638 files, covering phases including provenance, network exfiltration, credential access, install hooks, code patterns, obfuscation. Review the findings below before installing this package.
Package description: Flax: A neural network library for JAX designed for flexibility
v0.12.6
20 March 2026, 21:11 UTC
by Sigil Bot
Risk Score
671
Findings
56
Files Scanned
638
Provenance
Findings by Phase
Phase Ordering
Phases are ordered by criticality, with the most dangerous at the top. Click any phase header to expand or collapse its findings. Critical phases are expanded by default.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
flax-0.12.6/.github/workflows/flaxlib_publish.yml:41
CIBW_BEFORE_BUILD_LINUX: |
curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain=stable --profile=minimal -y &&
rustup showWhy was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-pip-setup-exec
CRITICALsetup.py executes code at install time
flax-0.12.6/examples/mnist/train_test.py:39
def setUp(self):
super().setUp()Why was this flagged?
This setup.py calls subprocess, os.system, exec, or eval during package installation. Legitimate packages rarely need to execute arbitrary commands at install time. This pattern is commonly used by malicious packages to download and run payloads, exfiltrate environment variables, or establish persistence. Rated CRITICAL because it runs with the installer's full permissions.
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