Which versions of font_stack are malicious?

The following RubyGems versions of font_stack are flagged malicious: 0.1.2. Treat any of these as compromised.

How do I remediate font_stack if I installed it?

Remove font_stack 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 font_stack — how do I know if it already compromised me?

If font_stack 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 font_stack part of a known attack campaign?

Yes — font_stack is associated with the RLMA-2024-05727, RLUA-2024-10246, RLUA-2026-08109 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 font_stack across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for font_stack (version 0.1.2).

Malicious package

font_stackRubyGems

Advisory published Jun 25, 2024Updated Sep 24, 2026

font_stack is a confirmed malicious RubyGems package (MAL-2024-6921) that executes malicious code on install (malicious version 0.1.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in font_stack (RubyGems)

MAL-2024-6921

Immediate action

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

gem uninstall font_stack

Malicious versions

1 flagged

0.1.2

Indicators of compromise (SHA-256)

e89fa38bb40d9fc8df5a0e2729d5c2ecdf1b03729272f6739242f28715b04b06

3a675188626b53f9a0ca9731fc37fbe5f196f324b702bdcb2e59cf21fee92877

d8439302314c1dbae930c8abc0c217594d5fa0b8fb8eae8ac8a485ecec41e32f

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for font_stack (version 0.1.2).
If you installed it — respond
Remove font_stack 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 font_stack 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. font_stack on RubyGems has been identified as a malicious package (version 0.1.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2024-05727RLUA-2024-10246RLUA-2026-08109

References

Credits

ReversingLabs · finder

Detect & block this

O3 blocks font_stack-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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