Which versions of font_league are malicious?

The following RubyGems versions of font_league are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate font_league if I installed it?

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

If font_league 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_league part of a known attack campaign?

Yes — font_league is associated with the RLMA-2024-05725, RLUA-2024-10244, RLUA-2026-08107 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_league across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for font_league (version 1.0.0).

Malicious package

font_leagueRubyGems

Advisory published Jun 25, 2024Updated Sep 24, 2026

font_league is a confirmed malicious RubyGems package (MAL-2024-6919) that executes malicious code on install (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in font_league (RubyGems)

MAL-2024-6919

Immediate action

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

gem uninstall font_league

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

e33443dd068fc9cc28f1645aed0e2f8bf8c5cd8dae187b1dfea7dcb089b5d6d7

cf89db137093939068a90dca2ab87d9f40012c5574dfedd61c9d19b7ba210ac0

08daae5a2743e2b3ae1be98b742d7d0e37b9858d8e6fa9eadc18ac6ba2170062

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for font_league (version 1.0.0).
If you installed it — respond
Remove font_league 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_league 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_league on RubyGems has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2024-05725RLUA-2024-10244RLUA-2026-08107

References

Credits

ReversingLabs · finder

Detect & block this

O3 blocks font_league-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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