eslint-generate-prereleasenpm
eslint-generate-prerelease is a confirmed malicious npm package (MAL-2026-13979) that executes malicious code on install (malicious version 99.9.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in eslint-generate-prerelease (npm)
What this malware does
Package ships an empty module (index.js = 'module.exports = {};') under a name that resembles internal tooling, published at an inflated version 99.9.1 — the canonical shape used to win version resolution against a private-registry package of the same name. Its single dependency, 'ltidisafe', is declared not as a registry package but as a direct tarball URL on a Google Cloud Storage bucket (https://ltidi.storage.googleapis.com/depenconf/ltidisafe-3.6.2.tgz). On npm install, npm fetches that tarball from a location the registry does not audit and executes any lifecycle scripts and main module it contains. The path segment 'depenconf' and the version-inflation pattern are consistent with a targeted dependency-confusion attack. The lure package itself is hollow; the harm arrives through the URL-pinned transitive dependency.
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
Malicious packageFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for eslint-generate-prerelease (version 99.9.1). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging eslint-generate-prerelease across your stack and pipelines.
If you installed it — respond
Remove eslint-generate-prerelease 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 eslint-generate-prerelease was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks eslint-generate-prerelease before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks eslint-generate-prerelease-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.