open-vp-calPyPI
Advisory published Updated
open-vp-cal is a confirmed malicious PyPI package (MAL-2026-2138) that steals credentials and exfiltrates sensitive data (malicious version 1.3.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in open-vp-cal (PyPI)
What this malware does
When executing the module, the code installs a package from a remote location. The remote package contains malicious code exfiltrating selected env variables and selected information from credential files. The code claims to be security research.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-03-open-vp-cal
Reasons (based on the campaign):
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exfiltration-env-variables
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Downloads and executes a remote malicious script.
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The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for open-vp-cal (version 1.3.1).
If you installed it — respond
open-vp-cal 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.
Did it already run?
If open-vp-cal 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
Campaign
References
Credits
- Kamil Mańkowski (kam193) · reporter
Detect & block this
O3 blocks open-vp-cal-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.