# MAL-2026-17525: Malicious code in tiny-css-token-parser (npm)


- **Type:** Malicious package
- **Package:** `tiny-css-token-parser` (npm)
- **Published:** 4 Oct 2026

## What is MAL-2026-17525?

MAL-2026-17525 is a malicious package in tiny-css-token-parser, published on 4 Oct 2026. 

### Official description

Package is advertised as a CSS token parser but ships thunderboltRegistry.js which runs an IIFE on module load that collects hostname, pid, Node version, platform, and the output of `id` and `uname -r` via child_process.execSync, then exfiltrates them as DNS/HTTP subdomains under an oast.live interact.sh collector and a POST to webhook.site/0492a36c-4d7b-408a-865c-226db25987ba with a `where=internetbrands` tag. The package manifest aliases seven internal Wix Thunderbolt registry module names (thunderboltRegistry, siteAssetsRegistry, documentManagementRegistry, editorRegistry, corvidRegistry, and others) to the same recon module and exports factories under those keys, so any loader that resolves those internal names to this public package will execute the recon payload. The name/description are a cover story; the actual behavior is targeted dependency-confusion reconnaissance against Wix's internetbrands build graph.

## What should I do about MAL-2026-17525?

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-2026-17525 is a malicious package: tiny-css-token-parser (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-2026-17525/ (Markdown: https://insights.sbomify.com/MAL-2026-17525/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-17525

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-17525/
Summaries are generated and may contain mistakes; the official description above is the record.