# MAL-2026-13393: Malicious code in wallet-monitor-snap (npm)


- **Type:** Malicious package
- **Package:** `wallet-monitor-snap` (npm)
- **Published:** 6 Aug 2026

## What is MAL-2026-13393?

MAL-2026-13393 is a malicious package in wallet-monitor-snap, published on 6 Aug 2026. 

### Official description

wallet-monitor-snap is a MetaMask Snap whose onRpcRequest handler implements a 'showSecurityAlert' method that opens a snap_dialog inside MetaMask's trusted UI, tells the user their account has 'unusual activity', and prompts them to enter their Secret Recovery Phrase. The typed BIP-39 mnemonic is returned to the invoking dapp as `{ captured: result }`. The snap declares `endowment:rpc` with `dapps: true`, so any web origin that can reach the snap can invoke this method and receive the seed phrase. In-source comments explicitly frame the package's advertised 'ping' and 'estimateGas' RPC methods as a cover story: 'Benign ping method so the snap appears legitimate during store review' and 'Gas estimation facade (the "legitimate" cover feature)'. Any HD wallet account derived from the phrase becomes fully controllable by the caller.

## What should I do about MAL-2026-13393?

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-2026-13393 is a malicious package: wallet-monitor-snap (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-2026-13393/ (Markdown: https://insights.sbomify.com/MAL-2026-13393/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13393

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13393/
Summaries are generated and may contain mistakes; the official description above is the record.