Which versions of bamdler are malicious?

The following RubyGems versions of bamdler are flagged malicious: 1.0.0, 1.0.94078. Treat any of these as compromised.

How do I remediate bamdler if I installed it?

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

If bamdler 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 bamdler part of a known attack campaign?

Yes — bamdler is associated with the RLMA-2026-07187 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 bamdler across my projects, lockfiles, and CI pipelines?

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

Malicious package

bamdlerRubyGems

Advisory published Sep 22, 2026Updated Sep 24, 2026

bamdler is a confirmed malicious RubyGems package (MAL-2026-16561) that executes malicious code on install (malicious versions 1.0.0, 1.0.94078). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bamdler (RubyGems)

MAL-2026-16561

Immediate action

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

gem uninstall bamdler

Malicious versions

2 flagged

1.0.01.0.94078

Indicators of compromise (SHA-256)

e1dc84a8f0cf859e03162be8e1733ea90b7b7fb0de350c863cb6d90357773d2d

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for bamdler (2 malicious versions).
If you installed it — respond
Remove bamdler 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 bamdler 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. bamdler on RubyGems has been identified as a malicious package (versions 1.0.0, 1.0.94078 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-07187

Credits

ReversingLabs · finder

Detect & block this

O3 blocks bamdler-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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