# MAL-2026-4264: Malicious code in dds-js-idl (npm)


- **Type:** Malicious package
- **Package:** `dds-js-idl` (npm)
- **Published:** 23 May 2026

## What is MAL-2026-4264?

MAL-2026-4264 is a malicious package in dds-js-idl, published on 23 May 2026. 

### Official description

On `npm install`, postinstall.js runs `whoami` via execSync and collects os.hostname(), os.platform(), cwd, and CI/GitHub env vars, then exfiltrates them over HTTPS GET to `lg5ys3jebfzwk366pilidbmah1nsbszh.oastify.com/nasa/dds-js-canary/` and additionally performs a DNS lookup of `${whoami}.lg5ys3jebfzwk366pilidbmah1nsbszh.oastify.com` as a DNS-channel fallback that defeats egress HTTPS filtering. The package self-describes as a `Security research canary — NASA VDP`, but it fires on every install without consent and leaks installer identity and repository/CI context to a third-party Interactsh (oastify.com) collector controlled by the canary operator. Regardless of stated research intent, the structural behavior is install-time host fingerprinting and out-of-band exfiltration.

The OpenSSF Package Analysis project identified 'dds-js-idl' @ 1.0.0 (npm) as malicious.

It is considered malicious because:

- The package executes one or more commands associated with malicious behavior.

## What should I do about MAL-2026-4264?

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-2026-4264 is a malicious package: dds-js-idl (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-2026-4264/ (Markdown: https://insights.sbomify.com/MAL-2026-4264/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-4264

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-4264/
Summaries are generated and may contain mistakes; the official description above is the record.