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OpenAdvisories
Malicious MAL-2026-14137

mtslink-depconf-probe-profileusername

npm package · versions 1.0.0

Reported Aug 18, 2026 · Updated Aug 18, 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 (f679922753b7a59c59af851ae74275b5d4760b13fc516bc8c68e8e9568393dc6)
Package ships an empty index.js and a preinstall lifecycle script that performs a DNS lookup against probe.4otph6fase1x2won0hrfzul2wt2qqge5.oastify.com (Burp Collaborator out-of-band infrastructure). On npm install, the installer's resolver contacts the attacker-controlled subdomain, leaking install-time telemetry (resolver IP, timing, and the unique subdomain identifier) to a third party. The package name pattern and description ('Bug bounty auth probe - safe empty package') indicate a dependency-confusion / typosquat probe targeting an internal namespace; the only functionality is the outbound beacon.