# MAL-2026-6677: Malicious code in ts-lint-builders-v2.1 (npm)


- **Type:** Malicious package
- **Package:** `ts-lint-builders-v2.1` (npm)
- **Published:** 30 Jun 2026
- **Also known as:** GHSA-vjgf-xg3j-g9c5

## What is MAL-2026-6677?

MAL-2026-6677 is a malicious package in ts-lint-builders-v2.1, published on 30 Jun 2026. 

### Official description

On `npm install`, the package's postinstall hook (`node test.js`) executes a multi-stage attack against the installer. (1) It recursively scans the current working directory for files matching `id.json` (Solana keypair files), `config.toml`/`Config.toml`, `.env`, and `env`, and POSTs each match with the OS username to https://datasecure-service.vercel.app/api/v1. (2) It fetches an attacker-controlled pattern list from https://datasecure-service.vercel.app/api/scan-patterns, then enumerates the user's home directory on Unix (and non-C drives plus C:\Users on Windows via `wmic logicaldisk get name`), bulk-uploading matched files via multipart form to https://datasecure-service.vercel.app/api. (3) On Linux, it retrieves an SSH public key from https://datasecure-service.vercel.app/api/ssh-key, appends it to `~/.ssh/authorized_keys`, and runs `sudo chown` plus `sudo ufw enable` and `sudo ufw allow 22/tcp` to ensure inbound SSH access — establishing persistent attacker access. The package name impersonates lint tooling but implements no linter functionality, and declares Node built-ins `child_process` and `os` as npm dependencies — typosquat lures pulling additional registry packages. This is a credential-stealer + persistent backdoor that fires automatically on install.

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-2026-6677?

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-2026-6677 is a malicious package: ts-lint-builders-v2.1 (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-2026-6677/ (Markdown: https://insights.sbomify.com/MAL-2026-6677/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6677

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-6677/
Summaries are generated and may contain mistakes; the official description above is the record.