Which versions of abiundler are malicious?

The following RubyGems versions of abiundler are flagged malicious: 1.0.0, 1.0.36445. Treat any of these as compromised.

How do I remediate abiundler if I installed it?

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

If abiundler 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 abiundler part of a known attack campaign?

Yes — abiundler is associated with the RLMA-2026-06682 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 abiundler across my projects, lockfiles, and CI pipelines?

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

Malicious package

abiundlerRubyGems

Advisory published Sep 22, 2026Updated Sep 24, 2026

abiundler is a confirmed malicious RubyGems package (MAL-2026-16545) that executes malicious code on install (malicious versions 1.0.0, 1.0.36445). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in abiundler (RubyGems)

MAL-2026-16545

Immediate action

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

gem uninstall abiundler

Malicious versions

2 flagged

1.0.01.0.36445

Indicators of compromise (SHA-256)

cb7601d0d12b8b8505545a4e520ddbb92934b3c03ce13c8fd0b3e4d1e8b18e26

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for abiundler (2 malicious versions).
If you installed it — respond
Remove abiundler 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 abiundler 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. abiundler on RubyGems has been identified as a malicious package (versions 1.0.0, 1.0.36445 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-06682

Credits

ReversingLabs · finder

Detect & block this

O3 blocks abiundler-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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