Which versions of bualder are malicious?

The following RubyGems versions of bualder are flagged malicious: 1.0.0, 1.0.13022. Treat any of these as compromised.

How do I remediate bualder if I installed it?

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

If bualder 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 bualder part of a known attack campaign?

Yes — bualder is associated with the RLMA-2026-07452 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 bualder across my projects, lockfiles, and CI pipelines?

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

Malicious package

bualderRubyGems

Advisory published Sep 22, 2026Updated Sep 24, 2026

bualder is a confirmed malicious RubyGems package (MAL-2026-16767) that executes malicious code on install (malicious versions 1.0.0, 1.0.13022). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bualder (RubyGems)

MAL-2026-16767

Immediate action

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

gem uninstall bualder

Malicious versions

2 flagged

1.0.01.0.13022

Indicators of compromise (SHA-256)

2e3fe557966ada43e87585ec8986a14e6f667d22acd14c782cbe45fe1d2ac653

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for bualder (2 malicious versions).
If you installed it — respond
Remove bualder 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 bualder 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. bualder on RubyGems has been identified as a malicious package (versions 1.0.0, 1.0.13022 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-07452

Credits

ReversingLabs · finder

Detect & block this

O3 blocks bualder-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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