# MAL-2026-13443: Malicious code in diezyyasha-baileys (npm)


- **Type:** Malicious package
- **Package:** `diezyyasha-baileys` (npm)
- **Published:** 6 Aug 2026
- **Also known as:** GHSA-78fc-2672-hcjg

## What is MAL-2026-13443?

MAL-2026-13443 is a malicious package in diezyyasha-baileys, published on 6 Aug 2026. 

### Official description

diezyyasha-baileys is a fork of the Baileys WhatsApp library that contains an obfuscated network destination in lib/Socket/messages-send.js. At lines 425 and 436 the code constructs a URL via String.fromCharCode(104,116,116,112,115,58,47,47,102,105,111,114,97,46,110,105,120,101,108,46,109,121,46,105,100,47) which decodes to https://fiora.nixel.my.id/ — a hardcoded third-party host reconstructed from a char-code array rather than a plain string. This destination is embedded inside the message-sending code path of a WhatsApp session library, where the caller has already provided authenticated session credentials and where message content, contacts, and session identifiers are handled. The obfuscated-destination pattern (char-code reconstruction) inside a wallet/messaging-session code path is the exfiltration fingerprint: a first-party integration would use a plain, configurable URL, not a fromCharCode-reconstructed hardcoded host in a fork of an upstream library.

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-2026-13443?

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-2026-13443 is a malicious package: diezyyasha-baileys (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-2026-13443/ (Markdown: https://insights.sbomify.com/MAL-2026-13443/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13443

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-13443/
Summaries are generated and may contain mistakes; the official description above is the record.