# string.prototype.repeat@1.0.0 security report (npm)

- Verdict: **Needs review** (risk level: medium)
- Scanned: 2026-10-06T14:24:33.000Z
- Files reviewed: 5
- Findings: 1 low severity finding
- Report: https://security.togoder.click/npm/string.prototype.repeat
- Source: Togoder Security (https://security.togoder.click), AI source-code review

## Summary

Togoder Security scanned the npm package string.prototype.repeat@1.0.0 on Oct 6, 2026. An AI review of 5 source files produced 1 low severity finding. The overall verdict is medium: the findings flag risky but common patterns (dynamic code, unsafe defaults, broad file or network access) rather than confirmed malware.

## Findings

### [low] Dynamic module loading / import-time code execution

Finding ID: `NPS-1F5075A12C6A`

File: `auto.js:3`

The file immediately invokes require('./shim')(), which loads and executes a sibling module named 'shim' at import time. While this is a common pattern for polyfill packages like String.prototype.repeat, the actual behavior of './shim' cannot be verified from this snippet. Any top-level code execution on import is worth reviewing, especially since the required module could contain arbitrary logic (network calls, file system access, etc.). The comment indicates the package is 'repeat v1.0.0 by @mathias', which is a known legitimate polyfill library, but the analysis is limited to the provided file.

## Files reviewed

- `auto.js` (medium): This is a standard polyfill entry point that executes a sibling 'shim' module on import; no malicious patterns are visible in this file, but the referenced shim should be audited as it runs automatically on import.
- `implementation.js` (safe): No malicious patterns detected; the code is a clean polyfill implementation of String.prototype.repeat with no network, filesystem, or dynamic code execution concerns.
- `index.js` (safe): No malicious patterns detected
- `polyfill.js` (safe): Cleared by Jev triage; no further analysis needed
- `shim.js` (safe): No malicious patterns detected; the shim simply applies a String.prototype.repeat polyfill.

AI analysis is guidance, not a guarantee. Methodology: https://security.togoder.click/methodology