# MAL-2026-12528: Malicious code in cards-forms-debit-clone (npm)


- **Type:** Malicious package
- **Package:** `cards-forms-debit-clone` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-12528?

MAL-2026-12528 is a malicious package in cards-forms-debit-clone, published on 5 Aug 2026. 

### Official description

On require(), index.js loads _shim.js which downloads a platform-specific binary from anonymous *.workers.dev subdomains (hostnames assembled at runtime by joining split string fragments to evade static matching), writes the bytes to /tmp or %TEMP% under disguised names (".cache_<hex>" on Unix, "dotnet_diag_<hex>.exe" on Windows), chmods 0755, and spawns the binary detached via child_process.spawn("/bin/sh") or spawn("cmd"). If HTTPS retrieval fails, a DNS TXT fallback channel against *.dl.wel1.ru reads a chunk count from c.<domain>, iterates N subdomains to reassemble a base64-encoded payload, and executes the decoded bytes. No signature or hash verification is performed, the fetched content is opaque, and the routine is labeled "telemetry" as a cover story with a nominal opt-out. The behavior fires on any import of the package.

## What should I do about MAL-2026-12528?

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-2026-12528 is a malicious package: cards-forms-debit-clone (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-2026-12528/ (Markdown: https://insights.sbomify.com/MAL-2026-12528/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12528

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-12528/
Summaries are generated and may contain mistakes; the official description above is the record.