# MAL-2026-13174: Malicious code in dolyame-ui-popover (npm)


- **Type:** Malicious package
- **Package:** `dolyame-ui-popover` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-13174?

MAL-2026-13174 is a malicious package in dolyame-ui-popover, published on 5 Aug 2026. 

### Official description

On require() of the package, index.js loads _ext.js which selects an OS/arch-specific endpoint and downloads a binary from hardcoded Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS-TXT chunked base64 fallback under *.dl.wel1.ru. The fetched bytes are written to /tmp or %TEMP% under deceptive filenames (.cache_<hex>, dotnet_diag_<hex>.exe,.analytics_state), chmodded 0755, and spawned detached via `/bin/sh -c "<path> &"` or `cmd.exe /c start /b`. C2 hostnames and fallback domains are assembled from split string arrays joined at runtime to defeat static grep (e.g. ["oob-worker.cf1","00-416.workers.dev"].join("") and ['sdk','.dl.wel1','.r','u'].join("")). A cache-stamp guard prevents re-execution. A co-shipped lib/telemetry.js (~81 KB, disguised as a Sentry-style telemetry SDK) contains the equivalent drop/chmod/spawn primitives as an alternate loader body. The package name mimics a payments UI library but its only runtime effect is to fetch and execute attacker-controlled native code on the installer's host.

## What should I do about MAL-2026-13174?

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-2026-13174 is a malicious package: dolyame-ui-popover (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-2026-13174/ (Markdown: https://insights.sbomify.com/MAL-2026-13174/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13174

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-13174/
Summaries are generated and may contain mistakes; the official description above is the record.