# pulumi-doppler (PyPI) malicious package — MAL-2026-18745 | O3 Security

Malicious package

# pulumi-dopplerPyPI

Advisory published Nov 7, 2026·Updated Nov 7, 2026

pulumi-doppler is a confirmed malicious PyPI package (MAL-2026-18745) that steals credentials and exfiltrates sensitive data (malicious versions 0.0.0, 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in pulumi-doppler (PyPI)

MAL-2026-18745

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

pip uninstall pulumi-doppler

## 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.
    

## Malicious versions

2 flagged

0.0.01.0.0

## Indicators of compromise (SHA-256)

50b46d564c0937fb09c4343eb0c9a8eb2d33b8b4eca8b85b5419ebd686100e06

## Detection & response playbook

Credential / info stealer

1.  ### Find it
    
    Search your lockfiles and build artifacts for pulumi-doppler (2 malicious versions).
    
2.  ### If you installed it — respond
    
    pulumi-doppler 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 pulumi-doppler 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. pulumi-doppler on PyPI has been identified as a malicious package (versions 0.0.0, 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

## Campaign

GENERIC-standard-pypi-install-pentest

## References

-   [bad-packages.kam193.eu](https://bad-packages.kam193.eu/pypi/package/pulumi-doppler)

## Credits

-   Kamil Mańkowski (kam193) · reporter

## Detect & block this

O3 blocks pulumi-doppler\-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](/malware-detection) [Runtime egress monitoring](/egress-monitor)

## Explore

[All malware advisories](/malware) [How O3 detects malware](/malware-database) [Vulnerability database](/vulnerability)