# MAL-2026-13388: Malicious code in @simplipayng/checkout (npm)


- **Type:** Malicious package
- **Package:** `@simplipayng/checkout` (npm)
- **Published:** 6 Aug 2026
- **Also known as:** GHSA-cvhm-4vf7-gq9p

## What is MAL-2026-13388?

MAL-2026-13388 is a malicious package in @simplipayng/checkout, published on 6 Aug 2026. 

### Official description

The bundled main (dist/index.js) executes an eval(atob(...)) blob at module top level, so any Node-side require() of the package (SSR, tests, Next.js server rendering) runs it. The decoded payload uses unicode-escaped identifiers to hide require("child_process") + spawn, require("http"), require("https"), require("zlib"), and require("url"); iterates a list of public Ethereum JSON-RPC endpoints; embeds a unicode-escaped Ethereum address literal (0xa322...Ef1a); and constructs URLs of the form http://<host>:443/0x/cls and http://<host>:443/0x/ls. None of this is consistent with the advertised React card-checkout component. The package is also published as @simplipayng/checkout with homepage simplipay.ng, but the axios client is hardcoded to https://devpay.voxepay.app and https://pay.voxepay.app, so card details, PINs and OTPs entered into the checkout flow are POSTed to a domain that does not match the declared publisher. The double obfuscation (outer base64+eval, inner \uXXXX escapes on every sensitive identifier and URL) combined with child_process + network primitives inside a UI library is a dropper/backdoor shape, not a build artifact.

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-2026-13388?

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-2026-13388 is a malicious package: @simplipayng/checkout (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-2026-13388/ (Markdown: https://insights.sbomify.com/MAL-2026-13388/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13388

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13388/
Summaries are generated and may contain mistakes; the official description above is the record.