Which versions of bumdleu are malicious?

The following RubyGems versions of bumdleu are flagged malicious: 1.0.0, 1.0.2876. Treat any of these as compromised.

How do I remediate bumdleu if I installed it?

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

If bumdleu 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 bumdleu part of a known attack campaign?

Yes — bumdleu is associated with the RLMA-2026-07542 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 bumdleu across my projects, lockfiles, and CI pipelines?

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

Malicious package

bumdleuRubyGems

Advisory published Sep 22, 2026Updated Sep 24, 2026

bumdleu is a confirmed malicious RubyGems package (MAL-2026-16856) that executes malicious code on install (malicious versions 1.0.0, 1.0.2876). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bumdleu (RubyGems)

MAL-2026-16856

Immediate action

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

gem uninstall bumdleu

Malicious versions

2 flagged

1.0.01.0.2876

Indicators of compromise (SHA-256)

a365f82775b5f40a35012da5bd99d5ac5d7c7f1bcd3064ed0910f54fb77b786e

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for bumdleu (2 malicious versions).
If you installed it — respond
Remove bumdleu 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 bumdleu 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. bumdleu on RubyGems has been identified as a malicious package (versions 1.0.0, 1.0.2876 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-07542

Credits

ReversingLabs · finder

Detect & block this

O3 blocks bumdleu-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

All malware advisories How O3 detects malware Vulnerability database