Which versions of bunider are malicious?

The following RubyGems versions of bunider are flagged malicious: 1.0.0, 1.0.75071. Treat any of these as compromised.

How do I remediate bunider if I installed it?

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

If bunider 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 bunider part of a known attack campaign?

Yes — bunider is associated with the RLMA-2026-07715 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 bunider across my projects, lockfiles, and CI pipelines?

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

Malicious package

buniderRubyGems

Advisory published Sep 22, 2026Updated Sep 24, 2026

bunider is a confirmed malicious RubyGems package (MAL-2026-17029) that executes malicious code on install (malicious versions 1.0.0, 1.0.75071). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bunider (RubyGems)

MAL-2026-17029

Immediate action

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

gem uninstall bunider

Malicious versions

2 flagged

1.0.01.0.75071

Indicators of compromise (SHA-256)

da8fbc174720b0585bab70e04fe0aa050fb625a4cf6d73f6daeb5e32b961e7cd

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for bunider (2 malicious versions).
If you installed it — respond
Remove bunider 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 bunider 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. bunider on RubyGems has been identified as a malicious package (versions 1.0.0, 1.0.75071 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-07715

Credits

ReversingLabs · finder

Detect & block this

O3 blocks bunider-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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