Which versions of bumdlaer are malicious?

The following RubyGems versions of bumdlaer are flagged malicious: 1.0.0, 1.0.13733. Treat any of these as compromised.

How do I remediate bumdlaer if I installed it?

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

If bumdlaer 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 bumdlaer part of a known attack campaign?

Yes — bumdlaer is associated with the RLMA-2026-07511 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 bumdlaer across my projects, lockfiles, and CI pipelines?

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

Malicious package

bumdlaerRubyGems

Advisory published Sep 22, 2026Updated Sep 24, 2026

bumdlaer is a confirmed malicious RubyGems package (MAL-2026-16825) that executes malicious code on install (malicious versions 1.0.0, 1.0.13733). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bumdlaer (RubyGems)

MAL-2026-16825

Immediate action

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

gem uninstall bumdlaer

Malicious versions

2 flagged

1.0.01.0.13733

Indicators of compromise (SHA-256)

f11ae0f586123d5735935ee91d1e772f951a9d504687bd8c27c05c3d85203cd9

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for bumdlaer (2 malicious versions).
If you installed it — respond
Remove bumdlaer 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 bumdlaer 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. bumdlaer on RubyGems has been identified as a malicious package (versions 1.0.0, 1.0.13733 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-07511

Credits

ReversingLabs · finder

Detect & block this

O3 blocks bumdlaer-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

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