# MAL-2026-6195: Malicious code in ts-linter-builders (npm)


- **Type:** Malicious package
- **Package:** `ts-linter-builders` (npm)
- **Published:** 19 Jun 2026
- **Also known as:** GHSA-4g6m-jp93-p5x7

## What is MAL-2026-6195?

MAL-2026-6195 is a malicious package in ts-linter-builders, published on 19 Jun 2026. 

### Official description

index.js imports child_process and contains a hardcoded outbound POST to https://tg-wallet-manager.vercel.app, with additional fetch() calls to the same destination. The code reads environment data and host identifiers and ships them to this attacker-controlled endpoint. The package name advertises a TypeScript linter helper, but the embedded behavior is unrelated to linting and matches the shape of a credential/host-info beacon. The hardcoded third-party Vercel-hosted endpoint, combined with environment reads and child_process import, constitutes an installer-side exfiltration / RCE staging surface with no legitimate purpose for a 'linter builder' package.

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-2026-6195?

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-2026-6195 is a malicious package: ts-linter-builders (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-2026-6195/ (Markdown: https://insights.sbomify.com/MAL-2026-6195/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6195

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-6195/
Summaries are generated and may contain mistakes; the official description above is the record.