Which versions of buneler are malicious?

The following RubyGems versions of buneler are flagged malicious: 1.0.0, 1.0.33228. Treat any of these as compromised.

How do I remediate buneler if I installed it?

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

If buneler 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 buneler part of a known attack campaign?

Yes — buneler is associated with the RLMA-2026-07712 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 buneler across my projects, lockfiles, and CI pipelines?

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

Malicious package

bunelerRubyGems

Advisory published Sep 22, 2026Updated Sep 24, 2026

buneler is a confirmed malicious RubyGems package (MAL-2026-17026) that executes malicious code on install (malicious versions 1.0.0, 1.0.33228). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in buneler (RubyGems)

MAL-2026-17026

Immediate action

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

gem uninstall buneler

Malicious versions

2 flagged

1.0.01.0.33228

Indicators of compromise (SHA-256)

b69d3eb9e389ca599da47afcf49568d62866556cffb9a54af644d75b171df21a

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for buneler (2 malicious versions).
If you installed it — respond
Remove buneler 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 buneler 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. buneler on RubyGems has been identified as a malicious package (versions 1.0.0, 1.0.33228 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-07712

Credits

ReversingLabs · finder

Detect & block this

O3 blocks buneler-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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