# MAL-2026-5414: Malicious code in @klapp-login-platform/oidc (npm)


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

## What is MAL-2026-5414?

MAL-2026-5414 is a malicious package in @klapp-login-platform/oidc, published on 9 Jun 2026. 

### Official description

On `npm install`, the package executes `node index.js` via its preinstall hook. index.js collects the installer's hostname (`os.hostname()`), username (`os.userInfo().username`), package directory (`__dirname`), and current working directory (`process.cwd()`), serializes them to JSON, hex-encodes the payload, and exfiltrates it through two channels: (1) a DNS resolution of a subdomain under `d8jbmnsqcfu78dfs8vdg34ohqhirb4pbg.oast.live` (interactsh-style out-of-band exfiltration), and (2) an HTTP POST to the bare IP `172.201.213.59:9090/c`. The package ships no documented functionality matching its `@klapp-login-platform/oidc` name; the description is 'security research'. The high version number (99.0.2) under an org-style scope on the public registry is consistent with a dependency-confusion attack designed to pre-empt resolution of an internal private package of the same name, and the beaconing payload provides the attacker with confirmation of which organizations have resolved the public version.

## What should I do about MAL-2026-5414?

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-2026-5414 is a malicious package: @klapp-login-platform/oidc (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-2026-5414/ (Markdown: https://insights.sbomify.com/MAL-2026-5414/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-5414

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-5414/
Summaries are generated and may contain mistakes; the official description above is the record.