# MAL-2026-5415: Malicious code in @klapp-login-platform/routes (npm)


- **Type:** Malicious package
- **Package:** `@klapp-login-platform/routes` (npm)
- **Published:** 9 Jun 2026

## What is MAL-2026-5415?

MAL-2026-5415 is a malicious package in @klapp-login-platform/routes, published on 9 Jun 2026. 

### Official description

On `npm install`, the package's `preinstall` lifecycle hook executes `index.js`, which collects the installer's hostname, username, package install path (`__dirname`), current working directory, and package name, serializes them to JSON, hex-encodes the result, and exfiltrates the data through two channels: DNS lookups against subdomains of `d8jbmnsqcfu78dfs8vdg34ohqhirb4pbg.oast.live` (an Interactsh out-of-band callback host) and an HTTP POST to the bare IP endpoint `http://172.201.213.59:9090/c`. The package ships almost no functional code; its purpose is the beacon. The scope `@klapp-login-platform` paired with an inflated `99.0.2` version and a generic `routes` name fits the canonical dependency-confusion pattern of publishing a high-version public package to shadow an internal private package of the same name, causing affected build environments to resolve and install this attacker-controlled release.

## What should I do about MAL-2026-5415?

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-2026-5415 is a malicious package: @klapp-login-platform/routes (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-2026-5415/ (Markdown: https://insights.sbomify.com/MAL-2026-5415/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-5415

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-5415/
Summaries are generated and may contain mistakes; the official description above is the record.