MAL-2026-5297 Malicious code in consumerweb-authflow (npm)

On npm install, the package's postinstall.js collects host identifiers via os.hostname(), os.userInfo().username, os.platform(), and the current working directory, then POSTs them over HTTPS to kd1tbfhej84bcqde44rq77o79yfp3gr5.oastify.com (a Burp Collaborator out-of-band callback subdomain). The package's own metadata self-identifies as a dependency-confusion proof-of-concept (description: "Dependency confusion PoC - H1-lingtys", payload tag src: 'paypal-dep-confusion-poc'), and the package name is chosen to collide with an internal/private package name so that misconfigured resolvers pull this public version instead. Regardless of bug-bounty intent, every installer's machine identity is leaked to an external attacker-controlled OAST endpoint without consent, automatically, on a default install.

The OpenSSF Package Analysis project identified 'consumerweb-authflow' @ 4.1.1 (npm) as malicious.

It is considered malicious because:

• The package communicates with a domain associated with malicious activity.