# MAL-2026-17727: Malicious code in @galicia-toolkit-nestjs-20/paas (npm)


- **Type:** Malicious package
- **Package:** `@galicia-toolkit-nestjs-20/paas` (npm)
- **Published:** 9 Oct 2026

## What is MAL-2026-17727?

MAL-2026-17727 is a malicious package in @galicia-toolkit-nestjs-20/paas, published on 9 Oct 2026. 

### Official description

@galicia-toolkit-nestjs-20/paas is a dependency confusion package published to npm on 2026-10-09 by the account s4yhii__, targeting the internal @galicia-toolkit-* / @brick-v2 package namespaces with inflated versions (e.g. 999.0.x). Early versions resolve <hostname>.<tag>.dc.oob.s4yhii.com via DNS to beacon the victim's hostname. Later versions run `node index.js` from a preinstall hook, which loads a bundled native addon (prebuilds/<platform>-<arch>/metrics.node, Linux and Windows builds). The addon forks a detached process that collects hostname, username, OS/arch, cwd and the full values of CI/cloud secrets from environment variables (NPM_TOKEN, NODE_AUTH_TOKEN, GITHUB_TOKEN, ACTIONS_RUNTIME_TOKEN, ACTIONS_ID_TOKEN_REQUEST_TOKEN, AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_SESSION_TOKEN, SYSTEM_ACCESSTOKEN, AZURE_DEVOPS_EXT_PAT and others) and sends them as JSON via HTTP POST /native to oob.s4yhii.com:9999.

On require('@galicia-toolkit-nestjs-20/paas'), index.js unconditionally loads prebuilds/<platform>-<arch>/metrics.node at module top level inside a try/catch. The shipped ELF addon reads AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_SESSION_TOKEN, GITHUB_TOKEN, NPM_TOKEN, NODE_AUTH_TOKEN, SYSTEM_ACCESSTOKEN, ACTIONS_RUNTIME_TOKEN, and ACTIONS_ID_TOKEN_REQUEST_TOKEN from the process environment, together with hostname, uid, and cwd, and POSTs them as JSON to oob.s4yhii.com over a raw socket (gethostbyname/connect/send, request line 'POST /native HTTP/1.0'). The addon uses fork+setsid to background the exfiltration. The package ships no C/C++ source and no binding.gyp, is self-labeled as a NestJS toolkit, and the only on-load effect of the stub is to execute this opaque native binary. Strings observed inside metrics.node include 'AWS_SECRET_ACCESS_KEY', 'GITHUB_TOKEN', 'NPM_TOKEN', 'ACTIONS_RUNTIME_TOKEN', 'oob.s4yhii.com', and the hardcoded HTTP request format. The scoped name under an organization-shaped '@galicia-toolkit-nestjs-20' namespace combined with the implausibly high 999.0.1 version is consistent with a dependency-confusion lure designed to win resolution against an internal package.

## What should I do about MAL-2026-17727?

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-2026-17727 is a malicious package: @galicia-toolkit-nestjs-20/paas (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-2026-17727/ (Markdown: https://insights.sbomify.com/MAL-2026-17727/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-17727

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-17727/
Summaries are generated and may contain mistakes; the official description above is the record.