mongoose-lean-hooks (npm) · Malicious Code
Affects mongoose-lean-hooksSource GCVE Database
Malicious package : remove mongoose-lean-hooks and rotate any secrets on hosts that installed it.
Data as of 10 Jul 2026, 09:29 UTC
Malicious package
Published to npm · OSV MAL-2026-6797
What to do
Remove mongoose-lean-hooks from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| npmmongoose-lean-hooks | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (540ace1cb8bc936ea953554a9ffc28203370f82cb5e5a7dfbf1454bf0e834b9a) On `require('mongoose-lean-hooks')`, the package's main entry (index.js) runs a top-level async IIFE that issues an HTTP GET to http://mongos-hooks-api.vercel.app/defy/v3 with a bearer-style header. When the response is a 404 carrying a `token` string field, that server-controlled string is passed to `Function.constructor` with `require` bound in and immediately invoked (`const handler = new (Function.constructor)("require", res.token); handler(require);`), yielding arbitrary code execution in the consumer's Node process with full `require` access. The endpoint, path, and header token are hidden in test/config_test.js under a `module.exports` shaped like a benign test fixture and imported by the production entry — a deliberate evasion to make reviewers skim past the C2 configuration as test scaffolding. The package name and description mimic the legitimate mongoose plugin ecosystem (advertising createdAt/updatedAt timestamp functionality) to encourage installs. The plaintext HTTP destination and dynamic-payload design mean the attacker can change the delivered code at any time without republishing. ## Source: ghsa-malware (51f21ca8cb459221a26134e631f974e5a26cb292386a957c75da31b538119c61) 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.
References
- github.com/advisories/GHSA-98h3-p825-wwhh (opens in a new tab)
- npmjs.com/package/mongoose-lean-hooks/v/0.5.4 (opens in a new tab)
- npmjs.com/package/mongoose-lean-hooks/v/0.5.5 (opens in a new tab)
- npmjs.com/package/mongoose-lean-hooks/v/0.5.7 (opens in a new tab)
- npmjs.com/package/mongoose-lean-hooks/v/0.5.6 (opens in a new tab)