Which versions of zlibsrc are malicious?

Every published version of zlibsrc on PyPI is considered malicious. Remove the package entirely.

How do I remediate zlibsrc if I installed it?

zlibsrc is a typosquat — you almost certainly intended a legitimately-named package. Remove zlibsrc, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.

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

If zlibsrc 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 zlibsrc part of a known attack campaign?

Yes — zlibsrc is associated with the GHSA-h82j-8jxm-68qp 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 zlibsrc across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for zlibsrc (all published versions).

Malicious package

zlibsrcPyPI

zlibsrc is a confirmed malicious PyPI package (MAL-2022-7430) that typosquats a legitimate package to trick installs. Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in zlibsrc (PyPI)

MAL-2022-7430

Immediate action

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

pip uninstall zlibsrc

What this malware does

Security researchers at Check Point Research discovered a malicious package called zlibsrc impersonating the PyPI package zlib. PyPI has since removed zlibsrc.

Malicious versions

all versions

Every published version of this package is considered malicious — remove it entirely.

Indicators of compromise (SHA-256)

dfbf8f67470456ad6b704fb2c2d47edef71ce077afe59bf1a6f79913bde2fd5d

Detection & response playbook

Typosquat

Find it
Search your lockfiles and build artifacts for zlibsrc (all published versions).
If you installed it — respond
zlibsrc is a typosquat — you almost certainly intended a legitimately-named package. Remove zlibsrc, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.
Did it already run?
If zlibsrc 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. zlibsrc on PyPI has been identified as a malicious package (all published versions flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-h82j-8jxm-68qp

References

Detect & block this

O3 blocks zlibsrc-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

All malware advisories How O3 detects malware Vulnerability database