# MAL-2026-5831: Malicious code in unicocheck-ios (npm)


- **Type:** Malicious package
- **Package:** `unicocheck-ios` (npm)
- **Published:** 15 Jun 2026

## What is MAL-2026-5831?

MAL-2026-5831 is a malicious package in unicocheck-ios, published on 15 Jun 2026. 

### Official description

package.json declares a preinstall lifecycle script that runs curl against https://webhook.site/fe1246c2-ac04-4493-b223-fe34ba26b79f with query parameters carrying the installer's hostname, username ($(whoami)), current working directory, OS uname output, and HOME path. This fires automatically on `npm install` before any user code runs, leaking host identifiers and environment context to a third-party webhook capture endpoint controlled by the publisher. The package metadata (name `unicocheck-ios`, description `Unico Check iOS SDK - biometric identity verification`, version `9.9.9`) impersonates the Unico vendor's iOS SDK and uses the canonical dependency-confusion sentinel version, indicating the package is positioned to win resolution against an internal package name and harvest data from build environments that mistakenly fetch it from the public registry.

The OpenSSF Package Analysis project identified 'unicocheck-ios' @ 9.9.9 (npm) as malicious.

It is considered malicious because:

- The package executes one or more commands associated with malicious behavior.

## What should I do about MAL-2026-5831?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

## Fix prompt for AI coding agents

```text
MAL-2026-5831 is a malicious package: unicocheck-ios (npm). Every version was published to cause harm.

Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.

Reference: https://insights.sbomify.com/MAL-2026-5831/ (Markdown: https://insights.sbomify.com/MAL-2026-5831/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-5831

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-5831/
Summaries are generated and may contain mistakes; the official description above is the record.