wmj169905RubyGems
Advisory published Updated
wmj169905 is a confirmed malicious RubyGems package (MAL-2026-9380) 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 wmj169905 (RubyGems)
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for wmj169905 (version 0.0.1).
If you installed it — respond
Remove wmj169905 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 wmj169905 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
Campaign
References
Credits
- ReversingLabs · finder
Detect & block this
O3 blocks wmj169905-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.