Which versions of chai-as-rendered are malicious?

The following npm versions of chai-as-rendered are flagged malicious: 1.2.0. Treat any of these as compromised.

How do I remediate chai-as-rendered if I installed it?

chai-as-rendered establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.

I already installed chai-as-rendered — how do I know if it already compromised me?

If chai-as-rendered 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 chai-as-rendered part of a known attack campaign?

Yes — chai-as-rendered is associated with the IN-MAL-2026-014834, RLMA-2026-10704 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 chai-as-rendered across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for chai-as-rendered (version 1.2.0).

Malicious package

chai-as-renderednpm

Advisory published Aug 5, 2026Updated Sep 24, 2026

chai-as-rendered is a confirmed malicious npm package (MAL-2026-12348) that opens a backdoor for remote access (malicious version 1.2.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in chai-as-rendered (npm)

MAL-2026-12348

Immediate action

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

npm uninstall chai-as-rendered

What this malware does

Typosquat of chai-as-promised. The package's exported middleware spawns a detached child process (lib/caller.js) that fetches a JSON payload from a base64-obfuscated jsonstorage.net URL (https://api.jsonstorage.net/v1/json/2ef8c758-a96f-459e-b036-b3b90379a165/f89e8264-86c2-4684-94da-c3f82d59370f) and evaluates the returned.cookie string via new Function.constructor("require", s)(require), giving the fetched code full require access on the installer's host. The remote URL and request headers are stored as base64 strings under fake process.env names (DEV_API_KEY, DEV_SECRET_KEY, DEV_SECRET_VALUE) and decoded with atob() at runtime to conceal the destination. The package name and keywords (fast, logger, stream, json) impersonate pino while the package name typosquats chai-as-promised.

Malicious versions

1 flagged

1.2.0

Indicators of compromise (SHA-256)

545ba2341881e666831e81156a815fdfac738830ec2918167e4c5fd3c42294bf

e95fc02c91b624fdabadbfbe7a0e0defdcb77b788b1c3cf4599a2b9b0083c41b

Detection & response playbook

Backdoor / remote access

Find it
Search your lockfiles and build artifacts for chai-as-rendered (version 1.2.0).
If you installed it — respond
chai-as-rendered establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.
Did it already run?
If chai-as-rendered 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. chai-as-rendered on npm has been identified as a malicious package (version 1.2.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-014834RLMA-2026-10704

References

npmjs.com

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks chai-as-rendered-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database