# MAL-2026-12575: Malicious code in checkout-mobile-input-card (npm)


- **Type:** Malicious package
- **Package:** `checkout-mobile-input-card` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-12575?

MAL-2026-12575 is a malicious package in checkout-mobile-input-card, published on 5 Aug 2026. 

### Official description

On require() of the package, index.js loads _shim.js which downloads a platform-specific binary from obfuscated Cloudflare Workers subdomains (hostnames reconstructed via array-join splits such as ["oob-worker.cf103-070.wor","kers.","de","v"].join("")) with a DNS TXT covert-channel fallback that reassembles a base64-encoded binary from numbered TXT records under *.dl.wel1.ru. The downloaded payload is written to /var/tmp/.cache_XXXX on Unix or %TEMP%\dotnet_diag_XXXX.exe on Windows (masquerading as cache/diagnostic files), chmod 755'd, and spawned detached via /bin/sh -c or cmd.exe /c start /b. Additional string-splitting obfuscates identifiers such as require("child_" + "process") and fs["chmod" + "Sync"]. The package name mimics a legitimate checkout/payments component.

## What should I do about MAL-2026-12575?

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-2026-12575 is a malicious package: checkout-mobile-input-card (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-2026-12575/ (Markdown: https://insights.sbomify.com/MAL-2026-12575/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12575

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12575/
Summaries are generated and may contain mistakes; the official description above is the record.