consumerweb-authflownpm
Advisory published Updated
consumerweb-authflow is a confirmed malicious npm package (MAL-2026-5297) that executes malicious code on install (malicious versions 4.1.1, 4.1.3). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in consumerweb-authflow (npm)
What this malware does
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.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for consumerweb-authflow (2 malicious versions).
If you installed it — respond
Remove consumerweb-authflow from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If consumerweb-authflow was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
- OpenSSF: Package Analysis · finder
Detect & block this
O3 blocks consumerweb-authflow-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.