Which versions of flycalc are malicious?

The following PyPI versions of flycalc are flagged malicious: 1.2.0, 1.2.1. Treat any of these as compromised.

How do I remediate flycalc if I installed it?

Remove flycalc from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

I already installed flycalc — how do I know if it already compromised me?

If flycalc 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.

Is flycalc part of a known attack campaign?

Yes — flycalc is associated with the RLMA-2026-01678 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find flycalc across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for flycalc (2 malicious versions).

Malicious package

flycalcPyPI

Advisory published Mar 24, 2026Updated Apr 1, 2026

flycalc is a confirmed malicious PyPI package (MAL-2026-2399) that executes malicious code on install (malicious versions 1.2.0, 1.2.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in flycalc (PyPI)

MAL-2026-2399

Immediate action

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

pip uninstall flycalc

Malicious versions

2 flagged

1.2.01.2.1

Indicators of compromise (SHA-256)

3fa76cec9ee211579da894fd626691a0b2773e869b651ebc6f3fdd2c88246165

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for flycalc (2 malicious versions).
If you installed it — respond
Remove flycalc from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If flycalc 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. flycalc on PyPI has been identified as a malicious package (versions 1.2.0, 1.2.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-01678

Credits

ReversingLabs · finder

Detect & block this

O3 blocks flycalc-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Malware detection Runtime egress monitoring

Explore

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