test-workalendar-internal (PyPI) · Malicious Code
Affects test-workalendar-internalSource GCVE Database
Malicious package : remove test-workalendar-internal and rotate any secrets on hosts that installed it.
Data as of 29 Oct 2026, 18:07 UTC
Malicious package
Published to PyPI · OSV MAL-2026-18092
What to do
Remove test-workalendar-internal from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| PyPItest-workalendar-internal | Affected
| Fixed in– |
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Description
The PyPI package test-workalendar-internal versions 0.0.1, 0.0.2, and 0.0.3 contains malicious code that executes during installation. It installs a web terminal bound to localhost and exposes it via a Cloudflare tunnel, sending access credentials to an attacker-controlled server. This creates a remote shell backdoor on the installer's machine.