Which versions of vcsfetchx1 are malicious?

The following RubyGems versions of vcsfetchx1 are flagged malicious: 0.0.1. Treat any of these as compromised.

How do I remediate vcsfetchx1 if I installed it?

Remove vcsfetchx1 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 vcsfetchx1 — how do I know if it already compromised me?

If vcsfetchx1 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 vcsfetchx1 part of a known attack campaign?

Yes — vcsfetchx1 is associated with the RLMA-2026-03763, RLUA-2026-09692 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 vcsfetchx1 across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for vcsfetchx1 (version 0.0.1).

Malicious package

vcsfetchx1RubyGems

Advisory published Jul 7, 2026Updated Sep 24, 2026

vcsfetchx1 is a confirmed malicious RubyGems package (MAL-2026-9112) 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 vcsfetchx1 (RubyGems)

MAL-2026-9112

Immediate action

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

gem uninstall vcsfetchx1

Malicious versions

1 flagged

0.0.1

Indicators of compromise (SHA-256)

baf436794d1e27b889d28f68def113677fdc226815ac21d53802c016ec9054e4

b75731fca8776916f63632beaf6c94cd6e3bb0efe919924b3b7712563999b27f

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for vcsfetchx1 (version 0.0.1).
If you installed it — respond
Remove vcsfetchx1 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 vcsfetchx1 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. vcsfetchx1 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-2026-03763RLUA-2026-09692

References

github.com

Credits

ReversingLabs · finder

Detect & block this

O3 blocks vcsfetchx1-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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