# MAL-2026-5370: Malicious code in @doaction/eventemitter (npm)


- **Type:** Malicious package
- **Package:** `@doaction/eventemitter` (npm)
- **Published:** 9 Jun 2026
- **Also known as:** GHSA-926j-qqmq-889c

## What is MAL-2026-5370?

MAL-2026-5370 is a malicious package in @doaction/eventemitter, published on 9 Jun 2026. 

### Official description

The package is a thin shim. package.json declares `preinstall: node scripts/postinstall.js`, which require()s `@doaction/shared/bin/preinstall.js` — meaning the install-time behavior is sourced from a sibling package that is not present in this tarball. src/index.js re-exports `collectEnv`, `sendToDatadog`, and `reportEnvToDatadog` from @doaction/shared and offers a `reportEventEnv` helper that posts an EVENT_* env subset to Datadog using a caller-supplied API key (gated on explicit user invocation, not a silent relay in this package itself). Several attributes are characteristic of dependency-confusion staging: a 99.99.99 version (well above any plausible real release), an 'internal testing' description, and a scope (@doaction) that may shadow an internal namespace. The actual install-time impact depends entirely on @doaction/shared's implementation of `collectEnv` and the preinstall script, which cannot be confirmed from this tarball alone. Routing for human review to confirm whether @doaction/shared is attacker-controlled (dependency-confusion attack) and to assess the env-collection behavior it actually performs at install time.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

## What should I do about MAL-2026-5370?

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-2026-5370 is a malicious package: @doaction/eventemitter (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-2026-5370/ (Markdown: https://insights.sbomify.com/MAL-2026-5370/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-5370

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-5370/
Summaries are generated and may contain mistakes; the official description above is the record.