# MAL-2026-12166: Malicious code in bigops-figma-to-html (npm)


- **Type:** Malicious package
- **Package:** `bigops-figma-to-html` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-12166?

MAL-2026-12166 is a malicious package in bigops-figma-to-html, published on 5 Aug 2026. 

### Official description

On require, index.js unconditionally loads _bootstrap.js, which selects a platform-specific endpoint, fetches an opaque binary from author-controlled Cloudflare Workers subdomains (oob-worker.cf*.workers.dev) with a DNS-TXT chunked fallback over *.dl.wel1.ru (sdk/ext/pkg/net.dl.wel1.ru), writes it to /var/tmp/.cache_<hex> on POSIX or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmods 0755, and spawns it detached and unref'd via /bin/sh -c or cmd. Destination hostnames are constructed at runtime by joining split-string fragments (e.g. ["oob-wo","rker.cf103-070.worke","rs.de","v"].join("")) to hide them from static scanners. The DNS-TXT fallback retrieves a chunk count from c.<domain> and reassembles base64 chunks from N.<domain>, providing a covert delivery channel that bypasses HTTPS egress filtering. No hash or signature verification is performed; filenames impersonate dotnet diagnostics artifacts; opt-out is only via undocumented environment variables.

## What should I do about MAL-2026-12166?

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-2026-12166 is a malicious package: bigops-figma-to-html (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-2026-12166/ (Markdown: https://insights.sbomify.com/MAL-2026-12166/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12166

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12166/
Summaries are generated and may contain mistakes; the official description above is the record.