Which versions of locale-clamp-middleware are malicious?

The following npm versions of locale-clamp-middleware are flagged malicious: 7.99.99. Treat any of these as compromised.

How do I remediate locale-clamp-middleware if I installed it?

Remove locale-clamp-middleware 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 locale-clamp-middleware — how do I know if it already compromised me?

If locale-clamp-middleware 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 locale-clamp-middleware across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for locale-clamp-middleware (version 7.99.99).

Malicious package

locale-clamp-middlewarenpm

Advisory published Mar 11, 2026Updated Mar 23, 2026

locale-clamp-middleware is a confirmed malicious npm package (MAL-2026-1348) that executes malicious code on install (malicious version 7.99.99). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in locale-clamp-middleware (npm)

MAL-2026-1348

Immediate action

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

npm uninstall locale-clamp-middleware

What this malware does

The package locale-clamp-middleware was found to contain malicious code.

The OpenSSF Package Analysis project identified 'locale-clamp-middleware' @ 7.99.99 (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

7.99.99

Indicators of compromise (SHA-256)

2bf20042e762e0285aec0d582cd11af431d357a6ef99aab2b9febbbe69e0bf22

e27ac52023546a1eba07c629b78779bf6d13280f732fce7b0d66c18a660d90e6

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for locale-clamp-middleware (version 7.99.99).
If you installed it — respond
Remove locale-clamp-middleware 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 locale-clamp-middleware 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. locale-clamp-middleware on npm has been identified as a malicious package (version 7.99.99 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 locale-clamp-middleware-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