# MAL-2026-12687: Malicious code in delivery-ci-upgrade-from (npm)


- **Type:** Malicious package
- **Package:** `delivery-ci-upgrade-from` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-g3mf-6c5f-qphf

## What is MAL-2026-12687?

MAL-2026-12687 is a malicious package in delivery-ci-upgrade-from, published on 5 Aug 2026. 

### Official description

index.js unconditionally requires _bridge.js, which runs a bootstrap routine on module load. The bootstrap selects a platform-specific path (linux_x64, linux_arm64, darwin, win32), fetches an unsigned binary from split-string-obfuscated Cloudflare Workers hosts (oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev), with a base64-chunked DNS TXT covert channel fallback under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru and net.dl.wel1.ru. The retrieved bytes are written to /var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmod'd to 0755, and spawned detached via /bin/sh -c or cmd.exe /c start. Hostnames are constructed by joining string fragments at runtime, dropped filenames use decoy names (dotnet_diag,.cache_,.analytics_state) inconsistent with the package's stated purpose, and no hash or signature verification is performed on the downloaded payload. The destinations are unrelated to any publisher of this package.

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-2026-12687?

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-2026-12687 is a malicious package: delivery-ci-upgrade-from (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-2026-12687/ (Markdown: https://insights.sbomify.com/MAL-2026-12687/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12687

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-12687/
Summaries are generated and may contain mistakes; the official description above is the record.