Which versions of bumodler are malicious?

The following RubyGems versions of bumodler are flagged malicious: 1.0.0, 1.0.36008. Treat any of these as compromised.

How do I remediate bumodler if I installed it?

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

If bumodler 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 bumodler part of a known attack campaign?

Yes — bumodler is associated with the RLMA-2026-07574 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 bumodler across my projects, lockfiles, and CI pipelines?

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

Malicious package

bumodlerRubyGems

Advisory published Sep 22, 2026Updated Sep 24, 2026

bumodler is a confirmed malicious RubyGems package (MAL-2026-16888) that executes malicious code on install (malicious versions 1.0.0, 1.0.36008). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bumodler (RubyGems)

MAL-2026-16888

Immediate action

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

gem uninstall bumodler

Malicious versions

2 flagged

1.0.01.0.36008

Indicators of compromise (SHA-256)

900ae8f3f530308db3cf7a6151a553f0b564de00e9bedd9bd7e572dbab18134f

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for bumodler (2 malicious versions).
If you installed it — respond
Remove bumodler 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 bumodler 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. bumodler on RubyGems has been identified as a malicious package (versions 1.0.0, 1.0.36008 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-07574

Credits

ReversingLabs · finder

Detect & block this

O3 blocks bumodler-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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