# MAL-2026-5520: Malicious code in @access-risk/browser-remedy-react (npm)


- **Type:** Malicious package
- **Package:** `@access-risk/browser-remedy-react` (npm)
- **Published:** 10 Jun 2026

## What is MAL-2026-5520?

MAL-2026-5520 is a malicious package in @access-risk/browser-remedy-react, published on 10 Jun 2026. 

### Official description

On `npm install`, postinstall.js executes automatically and collects host identity and environment details using `os.hostname()`, `process.cwd()`, and filesystem reads, base64-encodes the data via `Buffer.from(...).toString('base64')`, and exfiltrates it through both DNS lookups (`require('dns')`) and HTTPS requests (`require('https')`). The dual-channel base64 exfiltration shape (DNS tunneling plus HTTPS POST) combined with collection of system identifiers is the canonical install-time data-theft fingerprint and provides direct attacker benefit: any machine running `npm install` for this package leaks identifying information to an external destination automatically, before the user has reviewed any package code.

## What should I do about MAL-2026-5520?

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-2026-5520 is a malicious package: @access-risk/browser-remedy-react (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-2026-5520/ (Markdown: https://insights.sbomify.com/MAL-2026-5520/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-5520

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-5520/
Summaries are generated and may contain mistakes; the official description above is the record.