# MAL-2026-12050: Malicious code in tinkoff-statist-browser-typed-client-sme.reporting.reporting (npm)


- **Type:** Malicious package
- **Package:** `tinkoff-statist-browser-typed-client-sme.reporting.reporting` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-hh5q-m44v-j748

## What is MAL-2026-12050?

MAL-2026-12050 is a malicious package in tinkoff-statist-browser-typed-client-sme.reporting.reporting, published on 5 Aug 2026. 

### Official description

The package executes a hidden loader when it is imported. The loader downloads and runs a platform-specific native payload from attacker-controlled Cloudflare Workers hosts, or reconstructs the payload from DNS TXT records under `well1.site` if HTTPS delivery fails. Systems that imported this package should be considered compromised; rotate accessible secrets and investigate temporary-file execution and DNS activity to the listed infrastructure.

On require() of the package, index.js loads _vendor.js which selects a platform-specific endpoint and fetches a binary payload from one of four Cloudflare Workers hosts whose names are assembled at runtime via string split/join concatenation (oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev), with DNS TXT-record fallback discovery via tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, and win.dl.well1.site. The fetched bytes are written to a randomized temp path with disguised names (.cache_<hex>, dotnet_diag_<hex>.exe), chmod 0755 on POSIX, and executed detached via spawn("/bin/sh", ["-c", fp + " &"]) or spawn("cmd",...) on Windows. Hostnames and sensitive API names (child_process, chmodSync) are reconstructed from array joins to defeat static matching; a 22822-second cooldown flag suppresses re-execution. The package name imitates an internal Tinkoff scope while lib/telemetry.js is unused cover-story code. Installing or requiring this package executes attacker-controlled native code on the host.

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-2026-12050?

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-2026-12050 is a malicious package: tinkoff-statist-browser-typed-client-sme.reporting.reporting (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-2026-12050/ (Markdown: https://insights.sbomify.com/MAL-2026-12050/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12050

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-12050/
Summaries are generated and may contain mistakes; the official description above is the record.