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OpenAdvisories
Malicious MAL-2026-14204

@sarex-team/sdk-js

npm package · versions 9.9.11

Reported Aug 19, 2026 · Updated Aug 19, 2026

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

Source: amazon-inspector (3b599c4cb22f02d79a217a53a61243a08017783b2a8d41afaa59b46128d863c2)
Package declares scripts.install="node index.js", which top-level requires lib/core.js. lib/core.js reads os.userInfo().username, os.hostname(), and process.cwd(), joins them with a package tag and timestamp, and issues dns.resolve4() against a subdomain of oob.sl4x0.xyz — a DNS-tunneled beacon to an attacker-controlled out-of-band collector. The destination host oob.sl4x0.xyz and the Node API names (os, dns, userInfo, hostname, cwd, resolve4) are stored as hex byte arrays in lib/b02e30.js and lib/6ad264.js and reconstructed at runtime via String.fromCharCode to disguise the recon path. The beacon fires automatically on npm install and again on every require() of the package, with no user interaction required.