Which versions of flag-v21 are malicious?

Every published version of flag-v21 on npm is considered malicious. Remove the package entirely.

How do I remediate flag-v21 if I installed it?

Remove flag-v21 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 flag-v21 — how do I know if it already compromised me?

If flag-v21 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 flag-v21 across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for flag-v21 (all published versions).

Malicious package

flag-v21npm

Advisory published Jan 16, 2026Updated Jan 16, 2026

flag-v21 is a confirmed malicious npm package (MAL-2026-283) that executes malicious code on install. Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in flag-v21 (npm)

MAL-2026-283

Immediate action

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

npm uninstall flag-v21

What this malware does

The package flag-v21 was found to contain malicious code.

Malicious versions

all versions

Every published version of this package is considered malicious — remove it entirely.

Indicators of compromise (SHA-256)

861f8969022fe9225cbe8c49c702b9604d3d204909179189ab09fa288c2c8b68

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for flag-v21 (all published versions).
If you installed it — respond
Remove flag-v21 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 flag-v21 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. flag-v21 on npm has been identified as a malicious package (all published versions flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks flag-v21-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

All malware advisories How O3 detects malware Vulnerability database