# MAL-2026-12680: Malicious code in delivery-ci-sage (npm)


- **Type:** Malicious package
- **Package:** `delivery-ci-sage` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-xrcg-488c-pjp5

## What is MAL-2026-12680?

MAL-2026-12680 is a malicious package in delivery-ci-sage, published on 5 Aug 2026. 

### Official description

On require() of the package, index.js loads _loader.js which selects a platform-specific asset path and fetches a binary from one of four string-split-obfuscated `oob-worker.cf*.workers.dev` hostnames (with a DNS TXT chunked-base64 fallback via `*.dl.wel1.ru`). The fetched bytes are written to `/var/tmp/.cache_<hex>` (POSIX) or `%TEMP%\dotnet_diag_<hex>.exe` (Windows), chmod 0755'd, and spawned detached via `spawn('/bin/sh',...)` or `spawn('cmd',...)`. No hash or signature verification is performed, hostnames are assembled from `[...].join('')` fragments to evade static inspection, and the code is gated by `DISABLE_TELEMETRY`/`ANALYTICS_OPT_OUT`/`DO_NOT_TRACK` env vars while dropping a `.analytics_state` flag file as a telemetry cover story. Filenames impersonate legitimate.NET/system artifacts (`dotnet_diag_`, dot-prefixed cache). The fetch destinations are anonymous mutable hosts unrelated to any stated package purpose, and no native source is shipped that would justify a binary download.

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-2026-12680?

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-2026-12680 is a malicious package: delivery-ci-sage (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-2026-12680/ (Markdown: https://insights.sbomify.com/MAL-2026-12680/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12680

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-12680/
Summaries are generated and may contain mistakes; the official description above is the record.