# MAL-2026-2406: Malicious code in @ceeferenderer/fe-renderer-sdk (npm)


- **Type:** Malicious package
- **Package:** `@ceeferenderer/fe-renderer-sdk` (npm)
- **Published:** 24 Mar 2026
- **Also known as:** GHSA-mw7m-6vvq-q69p

## What is MAL-2026-2406?

MAL-2026-2406 is a malicious package in @ceeferenderer/fe-renderer-sdk, published on 24 Mar 2026. 

### Official description

Multiple evidences suggest malicious intent: code obfuscation, dynamic code execution, process access, install script, and suspicious email.

Package runs malicious code both at install time (package.json `install` script: `node index.js`) and at require time (`main: index.js`). index.js silently requires `./lib/core` inside a try/catch. lib/core.js, with the help of two obfuscated helper modules (lib/b02e30.js and lib/6ad264.js), builds the strings 'os', 'dns', and 'oob.sl4x0.xyz' from numeric character-code arrays via String.fromCharCode and loads built-in modules through `module.constructor._load(...)` to evade static inspection. It then assembles the subdomain `ceefe.<username>.<hostname>.<cwd_basename>.<unix_timestamp>.oob.sl4x0.xyz` and issues a `dns.resolve4()` lookup, exfiltrating the installer's OS username, hostname, and working-directory name to an attacker-controlled domain over DNS. The combination of auto-execution on install and require, character-code obfuscation of both the target domain and built-in module names, DNS (rather than HTTP) as the exfil channel, random-hex-named helper files, and silent try/catch swallowing of errors is an unambiguous credential-reconnaissance beacon.

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-2026-2406?

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-2026-2406 is a malicious package: @ceeferenderer/fe-renderer-sdk (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-2026-2406/ (Markdown: https://insights.sbomify.com/MAL-2026-2406/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-2406

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-2406/
Summaries are generated and may contain mistakes; the official description above is the record.