Which versions of feature-flip are malicious?

The following npm versions of feature-flip are flagged malicious: 1.0.1, 1.0.2. Treat any of these as compromised.

How do I remediate feature-flip if I installed it?

feature-flip is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed feature-flip — how do I know if it already compromised me?

If feature-flip 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 feature-flip part of a known attack campaign?

Yes — feature-flip is associated with the GHSA-wfc8-g67x-27cc 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 feature-flip across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for feature-flip (2 malicious versions).

Malicious package

feature-flipnpm

Advisory published Nov 24, 2025Updated Dec 1, 2025

feature-flip is a confirmed malicious npm package (MAL-2025-191091) that steals credentials and exfiltrates sensitive data (malicious versions 1.0.1, 1.0.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in feature-flip (npm)

MAL-2025-191091

Immediate action

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

npm uninstall feature-flip

What this malware does

The package feature-flip was found to contain malicious code.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

This package was compromised by the Sha1-Hulud: The Second Coming NPM worm. The malicious payload steals tokens and credentials and publishes them to GitHub. The worm will propogate itself to NPM packages the user owns and establish persistence is a GitHub action. The package may also destroy the user's home directory.

Malicious versions

2 flagged

1.0.11.0.2

Indicators of compromise (SHA-256)

1d3a90cfc6cc14cf62f81b6f2ca995f00fbff67b1b819ba339516765de278bd2

83174532991b1005c74b76e25b734d60eb0e7f5820c156373fce8945bc16a4d2

70f38090f7d06e2ca6dedee4db704eb48de8c582ee65be6a5142487fba31d1e1

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for feature-flip (2 malicious versions).
If you installed it — respond
feature-flip is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If feature-flip 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. feature-flip on npm has been identified as a malicious package (versions 1.0.1, 1.0.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-wfc8-g67x-27cc

References

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks feature-flip-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database