Which versions of cms-github are malicious?

Every published version of cms-github on npm is considered malicious. Remove the package entirely.

How do I remediate cms-github if I installed it?

Remove cms-github 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 cms-github — how do I know if it already compromised me?

If cms-github 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 cms-github part of a known attack campaign?

Yes — cms-github is associated with the GHSA-3r39-h7xh-jg85 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 cms-github across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for cms-github (all published versions).

Malicious package

cms-githubnpm

Advisory published Jun 1, 2026Updated Jun 1, 2026

cms-github is a confirmed malicious npm package (MAL-2026-5107) that executes malicious code on install. Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in cms-github (npm)

MAL-2026-5107

Immediate action

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

npm uninstall cms-github

What this malware does

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Malicious versions

all versions

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

Indicators of compromise (SHA-256)

a0c5fca13510452946e5210125e75436d171401f46ce7f1e36e32c266e2cbc41

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for cms-github (all published versions).
If you installed it — respond
Remove cms-github 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 cms-github 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. cms-github on npm 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-3r39-h7xh-jg85

References

github.com

Detect & block this

O3 blocks cms-github-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