Which versions of buadler are malicious?

The following RubyGems versions of buadler are flagged malicious: 1.0.0, 1.0.43648. Treat any of these as compromised.

How do I remediate buadler if I installed it?

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

If buadler 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 buadler part of a known attack campaign?

Yes — buadler is associated with the RLMA-2026-07451 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 buadler across my projects, lockfiles, and CI pipelines?

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

Malicious package

buadlerRubyGems

Advisory published Sep 22, 2026Updated Sep 24, 2026

buadler is a confirmed malicious RubyGems package (MAL-2026-16766) that executes malicious code on install (malicious versions 1.0.0, 1.0.43648). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in buadler (RubyGems)

MAL-2026-16766

Immediate action

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

gem uninstall buadler

Malicious versions

2 flagged

1.0.01.0.43648

Indicators of compromise (SHA-256)

24a85340938a93e6e0d4a74e3f67fdd510161e55515e69321ffb46b290e9a6b5

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for buadler (2 malicious versions).
If you installed it — respond
Remove buadler 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 buadler 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. buadler on RubyGems has been identified as a malicious package (versions 1.0.0, 1.0.43648 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-07451

Credits

ReversingLabs · finder

Detect & block this

O3 blocks buadler-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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