What does the breadcrumb-service malware do?

The package breadcrumb-service was found to contain malicious code. The OpenSSF Package Analysis project identified 'breadcrumb-service' @ 999.9.0 (npm) as malicious. It is considered malicious because: - The package communicates with a domain associated with malicious activity. - The package executes one or more commands associated with malicious behavior.

Which versions of breadcrumb-service are malicious?

The following npm versions of breadcrumb-service are flagged malicious: 999.9.0. Treat any of these as compromised.

How do I remediate breadcrumb-service if I installed it?

Remove breadcrumb-service 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 breadcrumb-service — how do I know if it already compromised me?

If breadcrumb-service 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.

How do I find breadcrumb-service across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for breadcrumb-service (version 999.9.0).

Malicious package

breadcrumb-servicenpm

Advisory published Feb 6, 2026Updated Feb 22, 2026

breadcrumb-service is a confirmed malicious npm package (MAL-2026-804) that executes malicious code on install (malicious version 999.9.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in breadcrumb-service (npm)

MAL-2026-804

Immediate action

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

npm uninstall breadcrumb-service

What this malware does

The package breadcrumb-service was found to contain malicious code.

The OpenSSF Package Analysis project identified 'breadcrumb-service' @ 999.9.0 (npm) as malicious.

It is considered malicious because:

The package communicates with a domain associated with malicious activity.
The package executes one or more commands associated with malicious behavior.

Malicious versions

1 flagged

999.9.0

Indicators of compromise (SHA-256)

883dd2539c160123211625ac16fcb503ddaa9a07ba28e19784ab809cf8b04707

46f4e9359f962e7c7082988e5a0af26520798dd321ecda643cb8d14268ec9c5b

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for breadcrumb-service (version 999.9.0).
If you installed it — respond
Remove breadcrumb-service 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 breadcrumb-service 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. breadcrumb-service on npm has been identified as a malicious package (version 999.9.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Credits

Amazon Inspector · finder
OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks breadcrumb-service-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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