org-twilio-phone-numbers-utils

Details

**Severity:** Critical

**Affected versions:** `> 0`

The org-twilio-phone-numbers-utils package is a dependency-confusion squat of Twilio's npm namespace published by user 'yuva2210' (maintainer email [email protected]) at sentinel versions 99.99.99 and 99.99.100, chosen to outrank any internal/private version and win resolution against a private registry. The npm description is empty and the package provides no legitimate functionality; the name mimics a plausible internal Twilio package so that a misconfigured resolver installs this public lookalike instead of the intended private dependency. It belongs to the same campaign as the actor's twilio-serverless/twilio-assets/twilio-deploy/twilio-internal squats and beacons to the same webhook.site collector.

The package declares a postinstall hook ("node index.js") that executes automatically on a bare npm install with no consent gate. The index.js payload performs environment reconnaissance: it collects the npm package name (npm_package_name), os.hostname(), the OS username (os.userInfo().username), and the current working directory, serializes them to JSON, and exfiltrates the bundle via HTTPS POST to a hardcoded anonymous dead-drop at https://webhook.site/42ce0f0e-a0a0-41b5-b157-1c0f918e064f. Request errors are swallowed so the install appears to succeed.

Two iterations were published: version 99.99.99 (payload 494 bytes, sha256 prefix 0ec56ada88db35b6) beacons only to the webhook.site collector, while version 99.99.100 (payload 688 bytes, sha256 prefix cebf45a0feba28b3) additionally beacons to a redundant out-of-band callback at 8060h91v8p1bvvr24e3r8s3z4qahy7mw.oastify.com, ensuring the reconnaissance lands even where HTTPS egress to webhook.site is blocked. Both payloads are byte-identical across all four packages in this sub-cluster (twiliointernal-messaging-toolbox, org-twilio-phone-numbers-utils, twilio-platform-request, twilio-platform-async-data-fetch).

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/10d725c93770f68b0c7d […]

**References:**
- https://github.com/ossf/malicious-packages/blob/10d725c93770f68b0c7d3eebf16a4cc4e87c4bc1/osv/malicious/npm/org-twilio-phone-numbers-utils/MAL-2026-10931.json
- https://www.npmjs.com/package/org-twilio-phone-numbers-utils
- https://github.com/advisories/GHSA-wx9j-7j9w-4cm3

Compromised versions (1)

• > 0

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.