---
id: "MAL-2026-19146"
page: "https://infrastack.ai/live/MAL-2026-19146"
kind: "package"
aliases: ["MAL-2026-19146"]
title: "Malicious code in teahy-znrpz-util (npm)"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "teahy-znrpz-util", "fixed": [], "affected": "= 1.0.0", "ecosystem": "npm"}]
ecosystems: ["npm"]
tags: ["malicious", "package"]
not_affected_if: []
published_at: "2026-11-11T21:03:21+00:00"
first_seen_at: "2026-11-11T21:29:24+00:00"
updated_at: "2026-11-11T21:31:13+00:00"
sources: [{"source": "osv-malicious", "url": "https://osv.dev/vulnerability/MAL-2026-19146", "first_seen_at": "2026-11-11T21:29:24+00:00"}]
exploit_sources: []
---

# Malicious code in teahy-znrpz-util (npm)

Link for people: https://infrastack.ai/live/MAL-2026-19146 (this .md is for agents)

## Affected

- npm:teahy-znrpz-util affected = 1.0.0 fixed no fixed version listed

## Timeline

- 2026-11-11T21:29:24+00:00 osv-malicious https://osv.dev/vulnerability/MAL-2026-19146

## From the sources

---
_-= Per source details. Do not edit below this line.=-_

## Source: amazon-inspector (5d18143cb6c6ab53a6b224630d1b50f00578f4308414da4f384281a679d7861d)
index.js reads a numeric byte array stored under a non-standard `_bz` key inside package.json, decompresses it with zlib.inflateSync, and executes the resulting string via the Function constructor with `require` and `__dirname` bound in — all on module load. Execution is gated by an early-return when any of CI, GITHUB_ACTIONS, GITLAB_CI, TRAVIS, CIRCLECI, or SANDBOX environment variables are set, so the hidden code only runs on real developer or production hosts. Smuggling executable logic as a zlib blob under a private manifest key, decoding it, and running it through Function() at require time is an obfuscated-loader pattern; the package's self-description as a 'utility' does not match any behavior visible in its source. The payload executes with full Node privileges on the installer's machine as soon as the module is required.

---

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