# MAL-2026-13535: Malicious code in ded-pwa-c-mapping (npm)


- **Type:** Malicious package
- **Package:** `ded-pwa-c-mapping` (npm)
- **Published:** 7 Aug 2026

## What is MAL-2026-13535?

MAL-2026-13535 is a malicious package in ded-pwa-c-mapping, published on 7 Aug 2026. 

### Official description

On require of the package, _helpers.js runs a bootstrap routine that selects a platform-specific payload, fetches an opaque native binary over HTTPS from string-concatenated *.workers.dev hosts (oob-worker.cf100-416.workers.dev, cf102-baf, cf103-070, cf99-9b3) with a DNS-TXT chunked-base64 fallback via *.dl.wel1.ru, writes it to /var/tmp or %TEMP% under a disguised name (.cache_<hex> or dotnet_diag_<hex>.exe), chmods 0755, and spawns it detached via /bin/sh -c or cmd /c start. Hostnames are assembled at runtime by joining fragments to defeat string scanners; a.analytics_state marker file throttles re-execution, and DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK opt-out variables are referenced to frame the behavior as telemetry. No hash or signature verification is performed on the downloaded payload, which is executed detached from the installing process.

## What should I do about MAL-2026-13535?

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-2026-13535 is a malicious package: ded-pwa-c-mapping (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-2026-13535/ (Markdown: https://insights.sbomify.com/MAL-2026-13535/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13535

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13535/
Summaries are generated and may contain mistakes; the official description above is the record.