cvmbxcjiasdgnpm
Advisory published Updated
cvmbxcjiasdg is a confirmed malicious npm package (MAL-2026-13799) that typosquats a legitimate package to trick installs (malicious versions 1.0.0, 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in cvmbxcjiasdg (npm)
What this malware does
The package contains a single index.html file declared as main and no JavaScript entry point, lifecycle scripts (preinstall/install/postinstall/prepare), or library exports. The HTML mimics a Cloudflare 'Just a moment...' Turnstile challenge and embeds obfuscator.io-style JavaScript with a custom base64 string array. When the fake challenge completes, decoded strings are used to construct a URL via new URL(...), the current page's query parameters are forwarded via URLSearchParams(window.location.search).forEach(...targetUrl.searchParams.append...), and the browser is navigated with window.location.replace(targetUrl.toString()). The redirect only executes in a browser that renders index.html; npm install and require() of this package run no code and touch no installer resources. The artifact appears to be an abuse of the npm registry as a static host for a phishing/redirect lure rather than an attack on developers installing the package.
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.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
TyposquatFind it
Search your lockfiles and build artifacts for cvmbxcjiasdg (2 malicious versions).
If you installed it — respond
cvmbxcjiasdg is a typosquat — you almost certainly intended a legitimately-named package. Remove cvmbxcjiasdg, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.
Did it already run?
If cvmbxcjiasdg 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
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks cvmbxcjiasdg-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.