# MAL-2026-11170: Malicious code in @finxsecdemo/utils (npm)


- **Type:** Malicious package
- **Package:** `@finxsecdemo/utils` (npm)
- **Published:** 29 Jul 2026

## What is MAL-2026-11170?

MAL-2026-11170 is a malicious package in @finxsecdemo/utils, published on 29 Jul 2026. 

### Official description

The postinstall.js lifecycle script unconditionally issues an HTTPS GET and a DNS resolution against a hardcoded interact.sh/OAST subdomain (llhvrrffsffmousfvteqie2heq3c7rl55.oast.fun) on every install, reading os.hostname(), os.userInfo(), and process.env in the surrounding code. The beacon fires on `npm install` and reports the installer's source IP and DNS resolver IP to whoever owns the OAST token, giving them an enumeration list of hosts on which the package landed. The package's own `main` returns a formatCurrency string containing '[DEPENDENCY-CONFUSION-POC: this ran from the PUBLIC npm registry, not @finxsecdemo private packages]', which corrupts any consumer that displays formatted currency. Console framing as a 'dependency confusion PoC' is author-controlled labeling; the network callback and output corruption occur regardless.

The OpenSSF Package Analysis project identified '@finxsecdemo/utils' @ 1.0.2 (npm) as malicious.

It is considered malicious because:

- The package communicates with a domain associated with malicious activity.

## What should I do about MAL-2026-11170?

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-2026-11170 is a malicious package: @finxsecdemo/utils (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-2026-11170/ (Markdown: https://insights.sbomify.com/MAL-2026-11170/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-11170

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-11170/
Summaries are generated and may contain mistakes; the official description above is the record.