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Malicious package

sf126006RubyGems

Advisory published Updated

sf126006 is a confirmed malicious RubyGems package (MAL-2026-8589) 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 sf126006 (RubyGems)

MAL-2026-8589
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall sf126006

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

c84bfed0be0f03dde64010a701d99c96bf94865a9875502e8411dd3401cfb6fd
ec91085d70682d93492f57e97f93c48f337144fde968840fadd30a03f8d5b71a

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for sf126006 (version 0.0.1).

  2. If you installed it — respond

    Remove sf126006 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.

  3. Did it already run?

    If sf126006 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. sf126006 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-2026-03240RLUA-2026-09137

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks sf126006-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.

Explore

sf126006 (RubyGems) malicious package — MAL-2026-8589 | O3 Security