Which versions of bumdlier are malicious?

The following RubyGems versions of bumdlier are flagged malicious: 1.0.0, 1.0.52451. Treat any of these as compromised.

How do I remediate bumdlier if I installed it?

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

If bumdlier 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 bumdlier part of a known attack campaign?

Yes — bumdlier is associated with the RLMA-2026-07543 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 bumdlier across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for bumdlier (2 malicious versions).

Malicious package

bumdlierRubyGems

Advisory published Sep 22, 2026Updated Sep 24, 2026

bumdlier is a confirmed malicious RubyGems package (MAL-2026-16857) that executes malicious code on install (malicious versions 1.0.0, 1.0.52451). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bumdlier (RubyGems)

MAL-2026-16857

Immediate action

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

gem uninstall bumdlier

Malicious versions

2 flagged

1.0.01.0.52451

Indicators of compromise (SHA-256)

014c1db13fd53a90dd94e174d38163685da1e1d409ff5233933c9c221aa6b646

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for bumdlier (2 malicious versions).
If you installed it — respond
Remove bumdlier 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 bumdlier 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. bumdlier on RubyGems has been identified as a malicious package (versions 1.0.0, 1.0.52451 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-07543

Credits

ReversingLabs · finder

Detect & block this

O3 blocks bumdlier-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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