# MAL-2026-17724: Malicious code in @galicia-toolkit-nestjs/swagger (npm)


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

## What is MAL-2026-17724?

MAL-2026-17724 is a malicious package in @galicia-toolkit-nestjs/swagger, published on 9 Oct 2026. 

### Official description

@galicia-toolkit-nestjs/swagger 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.

The package presents itself as a NestJS Swagger integration (name resembles @nestjs/swagger, published at version 999.0.2 in a dependency-confusion shape) but ships a stub JavaScript API (forRoot/createLogger returning empty) that, on require(), loads a prebuilt native addon at prebuilds/<platform>-<arch>/metrics.node inside a try/catch that silently swallows errors. The native binary reads credential-grade environment variables including AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, GITHUB_TOKEN, NPM_TOKEN, NODE_AUTH_TOKEN, and ACTIONS_ID_TOKEN_REQUEST_TOKEN, collects host identity (hostname, uid via getpwuid/getuid, cwd, uname/release, arch, and the package tag passed in via _METRICS_PKG), formats a JSON payload, and sends it over a raw socket (gethostbyname+connect+send, HTTP/1.0 POST /native) to the hardcoded host oob.s4yhii.com. The loader daemonizes via fork+setsid to persist beyond the parent process. On any npm install followed by import/require of this package in a build pipeline, cloud credentials, GitHub Actions OIDC tokens, and npm publish tokens leave the host to an attacker-controlled endpoint.

## What should I do about MAL-2026-17724?

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-2026-17724 is a malicious package: @galicia-toolkit-nestjs/swagger (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-2026-17724/ (Markdown: https://insights.sbomify.com/MAL-2026-17724/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-17724

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-17724/
Summaries are generated and may contain mistakes; the official description above is the record.