# MAL-2026-5880: Malicious code in nat-ulid (npm)


- **Type:** Malicious package
- **Package:** `nat-ulid` (npm)
- **Published:** 16 Jun 2026
- **Also known as:** GHSA-wgqj-fphq-9x3q

## What is MAL-2026-5880?

MAL-2026-5880 is a malicious package in nat-ulid, published on 16 Jun 2026. 

### Official description

The package ships a bundled file at dist/node/payload.js containing several POST call sites (around lines 14592, 14621, 14805, 14923, 15805). Pattern matches alone cannot distinguish a legitimate HTTP client library from an exfiltration channel: the destinations may be configurable parameters of an exposed API, documented vendor endpoints, or attacker-controlled hosts. No corroborating behavior such as credential reads, environment scraping, install-time lifecycle execution, or known-bad infrastructure was identified in the available evidence. Routing to human review for semantic verification of the bundle's POST destinations and reachability.

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-2026-5880?

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-2026-5880 is a malicious package: nat-ulid (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-2026-5880/ (Markdown: https://insights.sbomify.com/MAL-2026-5880/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-5880

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-5880/
Summaries are generated and may contain mistakes; the official description above is the record.