Which versions of @anchor-ds/core are malicious?

The following npm versions of @anchor-ds/core are flagged malicious: 99.9.0. Treat any of these as compromised.

How do I remediate @anchor-ds/core if I installed it?

Remove @anchor-ds/core 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 @anchor-ds/core — how do I know if it already compromised me?

If @anchor-ds/core 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 @anchor-ds/core part of a known attack campaign?

Yes — @anchor-ds/core is associated with the RLMA-2026-00966, RLUA-2026-05806 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 @anchor-ds/core across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for @anchor-ds/core (version 99.9.0).

Malicious package

@anchor-ds/corenpm

Advisory published Mar 18, 2026Updated Sep 1, 2026

@anchor-ds/core is a confirmed malicious npm package (MAL-2026-1585) that executes malicious code on install (malicious version 99.9.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @anchor-ds/core (npm)

MAL-2026-1585

Immediate action

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

npm uninstall @anchor-ds/core

What this malware does

The package @anchor-ds/core was found to contain malicious code.

Malicious versions

1 flagged

99.9.0

Indicators of compromise (SHA-256)

faabf592fab3e78d01035ec279f6025f87a603255e8b35b22085d31653a535fb

9aaac3fbc20e4d10a4fcf379fa4637f05e1dccd9fb6123bdd9b0e26ce5e21854

3424adc563c7a493f6c7708a9b141b0a7a656fce7dbe41cb7d3a6ec0afcff565

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for @anchor-ds/core (version 99.9.0).
If you installed it — respond
Remove @anchor-ds/core 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 @anchor-ds/core 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. @anchor-ds/core on npm has been identified as a malicious package (version 99.9.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-00966RLUA-2026-05806

References

github.com

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks @anchor-ds/core-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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