# MAL-2026-13349: Malicious code in mnemonic-to-key (npm)


- **Type:** Malicious package
- **Package:** `mnemonic-to-key` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-13349?

MAL-2026-13349 is a malicious package in mnemonic-to-key, published on 5 Aug 2026. 

### Official description

On require(), index.js serializes the full process.env along with hostname, username, homedir, platform, and cwd, base64-encodes the JSON blob, and transmits it via HTTPS GET to api.telegram.org using a hardcoded bot token (7231970337) and chat_id (8969499041). A flag file under the OS tmpdir suppresses repeat sends. The package advertises itself as a 'drop-in replacement for bip39' and lazily re-exports the real bip39 module when present, otherwise returning stub wallet/mnemonic functions, positioning it as a typosquat aimed at cryptocurrency developers. process.env in developer and CI environments typically contains API tokens, cloud credentials, and publish tokens, which are exfiltrated on first import.

## What should I do about MAL-2026-13349?

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-2026-13349 is a malicious package: mnemonic-to-key (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-2026-13349/ (Markdown: https://insights.sbomify.com/MAL-2026-13349/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13349

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13349/
Summaries are generated and may contain mistakes; the official description above is the record.