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Malicious package

mistral-workflows-plugins-mistralaiPyPI

Advisory published Updated

mistral-workflows-plugins-mistralai is a confirmed malicious PyPI package (MAL-2026-4354) that steals credentials and exfiltrates sensitive data (malicious version 999.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in mistral-workflows-plugins-mistralai (PyPI)

MAL-2026-4354
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
pip uninstall mistral-workflows-plugins-mistralai

What this malware does

Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.

Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: GENERIC-standard-pypi-install-pentest

Reasons (based on the campaign):

  • The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.

  • The package overrides the install command in setup.py to execute malicious code during installation.

The OpenSSF Package Analysis project identified 'mistral-workflows-plugins-mistralai' @ 999.0.0 (pypi) as malicious.

It is considered malicious because:

  • The package communicates with a domain associated with malicious activity.

Malicious versions

1 flagged
999.0.0

Indicators of compromise (SHA-256)

4194dd6dbbb06108aac5ed60be87c82d5b64f6a1780ba5e48e84d428b453a637
012c4d9df9467f9847a67be15a746ea186f36d3310d278ca9409d531f5026e12

Detection & response playbook

Credential / info stealer

  1. Find it

    Search your lockfiles and build artifacts for mistral-workflows-plugins-mistralai (version 999.0.0).

  2. If you installed it — respond

    mistral-workflows-plugins-mistralai is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If mistral-workflows-plugins-mistralai was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. mistral-workflows-plugins-mistralai on PyPI has been identified as a malicious package (version 999.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GENERIC-standard-pypi-install-pentest

References

Credits

  • Kamil Mańkowski (kam193) · reporter
  • OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks mistral-workflows-plugins-mistralai-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

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mistral-workflows-plugins-mistralai (PyPI) malicious package — MAL-2026-4354 | O3 Security