# MAL-2026-4587: Malicious code in intl-ads (npm)


- **Type:** Malicious package
- **Package:** `intl-ads` (npm)
- **Published:** 25 May 2026

## What is MAL-2026-4587?

MAL-2026-4587 is a malicious package in intl-ads, published on 25 May 2026. 

### Official description

On `npm install`, the package's `scripts.preinstall` runs poc.js which collects hostname, username, full network configuration (ipconfig/ip a/resolv.conf), `id`/`whoami /all`, git remote, parent package.json, and CI configuration files (.gitlab-ci.yml,.github/workflows, Jenkinsfile, azure-pipelines.yml). It then iterates `process.env` and harvests any variable whose name contains AWS, AZURE, GITHUB, GITLAB, JENKINS, NPM, TOKEN, CI, BUILD, etc. — capturing values, not just names — and POSTs the JSON payload to `d8a5d9pon5bugoc35cngp9hcregcqyezu.oast.me` over HTTPS, with a DNS callback as a secondary channel. The package self-describes as authorized bug-bounty research targeting Walmart's private namespace via dependency confusion, but the public npm registry has no scope restriction: any developer or CI system that resolves this name will execute the recon and leak credentials. The OAST destination is an Interactsh collector, not a Walmart-owned endpoint, so harvested data leaves any authorized scope. Concrete installer harm: AWS/Azure/GitHub/GitLab/npm tokens present in CI environment are exfiltrated; host fingerprinting enables follow-on attacks.

## What should I do about MAL-2026-4587?

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-2026-4587 is a malicious package: intl-ads (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-2026-4587/ (Markdown: https://insights.sbomify.com/MAL-2026-4587/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-4587

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-4587/
Summaries are generated and may contain mistakes; the official description above is the record.