# MAL-2026-12239: Malicious code in tinkoff-component-page-loader (npm)


- **Type:** Malicious package
- **Package:** `tinkoff-component-page-loader` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-3p77-c6f9-pffh

## What is MAL-2026-12239?

MAL-2026-12239 is a malicious package in tinkoff-component-page-loader, published on 5 Aug 2026. 

### Official description

On require() of the package, index.js loads _platform.js which unconditionally invokes a setup routine that downloads a platform-specific binary from obfuscated Cloudflare Workers endpoints (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev) with a DNS-TXT covert-channel fallback to *.dl.well1.site. Destination hostnames are assembled at runtime via split-string.join() to defeat static string matching. The downloaded bytes are written to /tmp or %TEMP% under disguised names such as dotnet_diag_*.exe and.cache_*, chmodded 0755, and spawned detached via /bin/sh -c '<path> &' or cmd.exe /c start /b. A persistence marker (.analytics_state) is written and OPT_OUT environment variables gate execution for evasion. No hash/signature verification is performed and the downloaded binary is unrelated to the advertised component-loader purpose. The package name typosquats Tinkoff. Result: arbitrary attacker-controlled code executes on the installer's host at require time.

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-2026-12239?

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-2026-12239 is a malicious package: tinkoff-component-page-loader (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-2026-12239/ (Markdown: https://insights.sbomify.com/MAL-2026-12239/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12239

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12239/
Summaries are generated and may contain mistakes; the official description above is the record.