set-proto-chain (npm) · Malicious Code
Affects set-proto-chainSource GCVE Database
Malicious package : remove set-proto-chain and rotate any secrets on hosts that installed it.
Data as of 7 Jul 2026, 12:28 UTC
Malicious package
Published to npm · OSV MAL-2026-6079
What to do
Remove set-proto-chain 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 |
|---|---|---|
| npmset-proto-chain | 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 (bdb11eef3afbfc268bd48a18737884246861c7ae9e6a3d29901ae1379216c633) lib/index.js contains a base64-encoded URL (decoding to https://jsonkeeper.com/b/BN77K, an anonymous mutable paste host) that is fetched via axios.get; the response's `.data.cookie` field is then written to the stdin of a detached `node` child process for execution. The top-level index.js calls getThetaInterface() unconditionally, and package.json declares `postinstall: node index.js`, so the fetch-and-execute path fires automatically on `npm install` as well as on require(). The fetched payload is attacker-controlled and can change at any time. The package additionally impersonates the legitimate `proto-chain` package (README header `# proto-chain`, runtime error messages referencing `require('proto-chain')`), making accidental installs more likely. ## Source: ghsa-malware (e5464b83f14b49df255a13a51392d93c6632bd5605d85a3c670d99d37b967417) 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.