Which versions of bjndler are malicious?

The following RubyGems versions of bjndler are flagged malicious: 1.0.0, 1.0.39027. Treat any of these as compromised.

How do I remediate bjndler if I installed it?

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

If bjndler 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 bjndler part of a known attack campaign?

Yes — bjndler is associated with the RLMA-2026-07381 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 bjndler across my projects, lockfiles, and CI pipelines?

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

Malicious package

bjndlerRubyGems

Advisory published Sep 22, 2026Updated Sep 24, 2026

bjndler is a confirmed malicious RubyGems package (MAL-2026-16717) that executes malicious code on install (malicious versions 1.0.0, 1.0.39027). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bjndler (RubyGems)

MAL-2026-16717

Immediate action

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

gem uninstall bjndler

Malicious versions

2 flagged

1.0.01.0.39027

Indicators of compromise (SHA-256)

84fed69baf454204b90c8d5fb0510b26d20d7840f6aca0024f4eae91548675ef

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for bjndler (2 malicious versions).
If you installed it — respond
Remove bjndler 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 bjndler 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. bjndler on RubyGems has been identified as a malicious package (versions 1.0.0, 1.0.39027 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-07381

Credits

ReversingLabs · finder

Detect & block this

O3 blocks bjndler-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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