Which versions of taxjar-bundler are malicious?

The following RubyGems versions of taxjar-bundler are flagged malicious: 23.55.0. Treat any of these as compromised.

How do I remediate taxjar-bundler if I installed it?

Remove taxjar-bundler 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 taxjar-bundler — how do I know if it already compromised me?

If taxjar-bundler 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 taxjar-bundler part of a known attack campaign?

Yes — taxjar-bundler is associated with the RLMA-2024-05837, RLUA-2024-10358, RLUA-2026-09532 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 taxjar-bundler across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for taxjar-bundler (version 23.55.0).

Malicious package

taxjar-bundlerRubyGems

Advisory published Jun 25, 2024Updated Sep 24, 2026

taxjar-bundler is a confirmed malicious RubyGems package (MAL-2024-7032) that executes malicious code on install (malicious version 23.55.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in taxjar-bundler (RubyGems)

MAL-2024-7032

Immediate action

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

gem uninstall taxjar-bundler

Malicious versions

1 flagged

23.55.0

Indicators of compromise (SHA-256)

de83691db139f081e0e3bfb63da985c0182940afe168cc3681fd94989afb2916

cc145d34dd0c1b5fcd3b520490bd382daf8866177a59f070d621300cb621f9a1

5d58b19bacbb060fc7c70bc5e521d00f1149d89499e07debfa6badb7a38bfb6d

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for taxjar-bundler (version 23.55.0).
If you installed it — respond
Remove taxjar-bundler 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 taxjar-bundler 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. taxjar-bundler on RubyGems has been identified as a malicious package (version 23.55.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2024-05837RLUA-2024-10358RLUA-2026-09532

References

github.com

Credits

ReversingLabs · finder

Detect & block this

O3 blocks taxjar-bundler-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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