Which versions of zwday26 are malicious?

The following RubyGems versions of zwday26 are flagged malicious: 0.0.1. Treat any of these as compromised.

How do I remediate zwday26 if I installed it?

Remove zwday26 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 zwday26 — how do I know if it already compromised me?

If zwday26 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 zwday26 part of a known attack campaign?

Yes — zwday26 is associated with the RLMA-2026-04504, RLUA-2026-10442 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 zwday26 across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for zwday26 (version 0.0.1).

Malicious package

zwday26RubyGems

Advisory published Jul 7, 2026Updated Sep 24, 2026

zwday26 is a confirmed malicious RubyGems package (MAL-2026-9853) that executes malicious code on install (malicious version 0.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in zwday26 (RubyGems)

MAL-2026-9853

Immediate action

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

gem uninstall zwday26

Malicious versions

1 flagged

0.0.1

Indicators of compromise (SHA-256)

43ec492fa33d09d3c7b16a680ad4dcc976260f8373d0792bb6998a133693c80e

af9de2a636009bf9eb29a06bfe7c27d4a8bee09b0d486e48fe1f7aef4c023fb3

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for zwday26 (version 0.0.1).
If you installed it — respond
Remove zwday26 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 zwday26 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. zwday26 on RubyGems has been identified as a malicious package (version 0.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-04504RLUA-2026-10442

References

github.com

Credits

ReversingLabs · finder

Detect & block this

O3 blocks zwday26-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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