Which versions of biondler are malicious?

The following RubyGems versions of biondler are flagged malicious: 1.0.0, 1.0.93172. Treat any of these as compromised.

How do I remediate biondler if I installed it?

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

If biondler 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 biondler part of a known attack campaign?

Yes — biondler is associated with the RLMA-2026-07269 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 biondler across my projects, lockfiles, and CI pipelines?

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

Malicious package

biondlerRubyGems

Advisory published Sep 22, 2026Updated Sep 24, 2026

biondler is a confirmed malicious RubyGems package (MAL-2026-16607) that executes malicious code on install (malicious versions 1.0.0, 1.0.93172). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in biondler (RubyGems)

MAL-2026-16607

Immediate action

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

gem uninstall biondler

Malicious versions

2 flagged

1.0.01.0.93172

Indicators of compromise (SHA-256)

8e0377d6a438f76741d750e18cc582598088ce7f5ed09cb98a3ae83f393ccc28

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for biondler (2 malicious versions).
If you installed it — respond
Remove biondler 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 biondler 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. biondler on RubyGems has been identified as a malicious package (versions 1.0.0, 1.0.93172 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-07269

Credits

ReversingLabs · finder

Detect & block this

O3 blocks biondler-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

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