Which versions of chalk-cli are malicious?

The following RubyGems versions of chalk-cli are flagged malicious: 0.0.5. Treat any of these as compromised.

How do I remediate chalk-cli if I installed it?

Remove chalk-cli 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 chalk-cli — how do I know if it already compromised me?

If chalk-cli 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 chalk-cli part of a known attack campaign?

Yes — chalk-cli is associated with the RLMA-2025-06603 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 chalk-cli across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for chalk-cli (version 0.0.5).

Malicious package

chalk-cliRubyGems

Advisory published Dec 23, 2025Updated Jul 23, 2026

chalk-cli is a confirmed malicious RubyGems package (MAL-2025-192896) that executes malicious code on install (malicious version 0.0.5). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in chalk-cli (RubyGems)

MAL-2025-192896

Immediate action

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

gem uninstall chalk-cli

Malicious versions

1 flagged

0.0.5

Indicators of compromise (SHA-256)

e4417e453837a43d1076741866a38403f96787e6bb77a8b8b538fd7af6ef4ff7

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for chalk-cli (version 0.0.5).
If you installed it — respond
Remove chalk-cli 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 chalk-cli 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. chalk-cli on RubyGems has been identified as a malicious package (version 0.0.5 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-06603

Credits

ReversingLabs · finder

Detect & block this

O3 blocks chalk-cli-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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