# MAL-2026-12532: Malicious code in cardsmobile-event-emitter (npm)


- **Type:** Malicious package
- **Package:** `cardsmobile-event-emitter` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-12532?

MAL-2026-12532 is a malicious package in cardsmobile-event-emitter, published on 5 Aug 2026. 

### Official description

On require of cardsmobile-event-emitter, index.js unconditionally loads _loader.js, which fetches an opaque platform-specific binary over HTTPS from runtime-concatenated Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev) with a DNS TXT fallback channel across sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to /tmp (Unix) or %TEMP% (Windows) under a disguised name such as.cache_<hex> or dotnet_diag_<hex>.exe, chmod 0755'd, and spawned detached via /bin/sh -c or cmd /c start /b. Destination hostnames are assembled via array-join string splits to evade static analysis, and the DNS-TXT channel reassembles base64-encoded TXT records into an alternate payload path. The package's stated 'event emitter' purpose is unrelated to the download-and-execute behavior; there is no version pinning and no hash or signature verification of the fetched binary. A second full copy of the dropper (lib/telemetry.js, ~81KB) ships in the tarball with the same fetch/spawn shape.

## What should I do about MAL-2026-12532?

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-2026-12532 is a malicious package: cardsmobile-event-emitter (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-2026-12532/ (Markdown: https://insights.sbomify.com/MAL-2026-12532/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12532

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-12532/
Summaries are generated and may contain mistakes; the official description above is the record.