ioredis-osnpm
Advisory published Updated
ioredis-os is a confirmed malicious npm package (MAL-2026-5879) that steals credentials and exfiltrates sensitive data (malicious version 5.10.2). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in ioredis-os (npm)
What this malware does
ioredis-os appends -os to the widely-used ioredis package name and ships what appears to be a verbatim fork of ioredis (same author, same upstream repository URL git://github.com/luin/ioredis.git, identical API surface). It also declares a dependency on redis-type-os, another -os-suffixed name that mirrors redis-type. No install lifecycle scripts are declared and no credential theft, exfiltration, dropper, or silent-relay behavior is present in the reachable code from built/index.js — the current code looks clean. The concern is the naming pattern: a developer who mistypes or otherwise reaches ioredis-os instead of ioredis ends up running a fork that the upstream maintainer does not control, and the chained -os dependency expands that surface. Routing to human review so a maintainer can assess whether the fork is legitimate (intended derivative) or a name-confusion squat that should be removed.
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
Credential / info stealerFind it
Search your lockfiles and build artifacts for ioredis-os (version 5.10.2).
If you installed it — respond
ioredis-os is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If ioredis-os 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 ioredis-os-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.