Which versions of chain-promised-async are malicious?

The following npm versions of chain-promised-async are flagged malicious: 3.5.5. Treat any of these as compromised.

How do I remediate chain-promised-async if I installed it?

Remove chain-promised-async 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 chain-promised-async — how do I know if it already compromised me?

If chain-promised-async 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 chain-promised-async part of a known attack campaign?

Yes — chain-promised-async is associated with the RLMA-2026-01203 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 chain-promised-async across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for chain-promised-async (version 3.5.5).

Malicious package

chain-promised-asyncnpm

Advisory published Mar 18, 2026Updated Mar 23, 2026

chain-promised-async is a confirmed malicious npm package (MAL-2026-1689) that executes malicious code on install (malicious version 3.5.5). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in chain-promised-async (npm)

MAL-2026-1689

Immediate action

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

npm uninstall chain-promised-async

What this malware does

The package chain-promised-async was found to contain malicious code.

Malicious versions

1 flagged

3.5.5

Indicators of compromise (SHA-256)

20e3bf431382065cd4f64afa887d6c93b36c6e0b458f495b6a4779ad7b94da0f

9260393814045a3ce0ce9a27ff97fffcbaad7b38ad91f54d8cad995c3deb43af

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for chain-promised-async (version 3.5.5).
If you installed it — respond
Remove chain-promised-async 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 chain-promised-async 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. chain-promised-async on npm has been identified as a malicious package (version 3.5.5 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-01203

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks chain-promised-async-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