# MAL-2026-6392: Malicious code in cccmyssr3 (npm)


- **Type:** Malicious package
- **Package:** `cccmyssr3` (npm)
- **Published:** 24 Jun 2026

## What is MAL-2026-6392?

MAL-2026-6392 is a malicious package in cccmyssr3, published on 24 Jun 2026. 

### Official description

On `npm install`, this package automatically runs postinstall.js, which executes `curl -X POST` with a body containing the installer's hostname (`$(hostname)`), current user (`$(whoami)`), and the first 10 environment variables base64-encoded (`$(env | head -10 | base64 -w 0)`), sending them over plain HTTP to http://r1x55270.requestrepo.com — a requestrepo.com subdomain used as an attacker data-collection endpoint. Environment variables on developer and CI machines routinely contain credentials, API tokens, and CI secrets, so this is a credential-theft payload. The package's `main` is a trivial one-line `formatDate` stub and its description is 'A harmless utility package' — a cover story unrelated to the lifecycle behavior.

## What should I do about MAL-2026-6392?

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-2026-6392 is a malicious package: cccmyssr3 (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-2026-6392/ (Markdown: https://insights.sbomify.com/MAL-2026-6392/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6392

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-6392/
Summaries are generated and may contain mistakes; the official description above is the record.