cors-versionnpm
cors-version is a confirmed malicious npm package (MAL-2026-12026) that executes malicious code on install (malicious versions 1.0.0, 1.0.1, 1.0.2…). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in cors-version (npm)
What this malware does
The CommonJS entry src/index.cjs exports getPlugin(), which performs an HTTPS GET to the hardcoded host astonishing-torrone-ffb31e.netlify.app with TLS verification disabled (rejectUnauthorized: false) and passes the response body directly to new Function(..., require)(require), executing the retrieved JavaScript inside the caller's Node.js process with full require access. The package advertises itself as a zero-dependency SVG utility library and its ESM sibling src/index.mjs does not expose getPlugin, so the remote loader is only present in the CJS build and is unrelated to any declared functionality. Any consumer that imports the package and invokes getPlugin() — or downstream tooling that resolves plugin factories by name — will fetch and run attacker-controlled JavaScript, and the disabled TLS check additionally exposes the fetch to MITM substitution.
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 cors-version (6 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging cors-version across your stack and pipelines.
If you installed it — respond
Remove cors-version 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 cors-version 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 cors-version 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 cors-version-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.