# debug@4.3.7 security report (npm)

- Verdict: **No issues** (risk level: safe)
- Scanned: 2026-10-04T16:28:21.000Z
- Files reviewed: 4
- Findings: 3 low severity findings
- Report: https://security.togoder.click/npm/debug@4.3.7
- Source: Togoder Security (https://security.togoder.click), AI source-code review

## Summary

Togoder Security scanned the npm package debug@4.3.7 on Oct 4, 2026. An AI review of 4 source files produced 3 low severity findings. No malicious behavior, install-time payloads, credential theft or exfiltration were identified.

## Findings

### [low] LocalStorage access

Finding ID: `NPS-BE6115959FBD`

File: `src/browser.js:165`

Reads/writes the 'debug' key in localStorage to persist namespace configuration. This is documented, expected behavior of the debug package.

### [low] Environment variable access

Finding ID: `NPS-ADE64D393E5A`

File: `src/browser.js:195`

Reads process.env.DEBUG for Electron environments. This is standard debug configuration behavior, not credential harvesting.

### [low] Dynamic regular expression construction

Finding ID: `NPS-BBFC6DC26FCA`

File: `src/common.js:167`

The enable() function constructs RegExp objects from user-controlled namespace strings without escaping. This could theoretically lead to ReDoS if a malicious namespace is provided, but in the context of the debug package this is expected behavior and not a security vulnerability in itself.

## Files reviewed

- `src/browser.js` (safe): This is the legitimate browser implementation of the well-known 'debug' npm package; no malicious patterns, exfiltration, dynamic execution, or suspicious network/process activity were detected.
- `src/common.js` (safe): This is the legitimate source code for the popular 'debug' npm package; no malicious patterns such as data exfiltration, credential harvesting, obfuscation, or backdoors were detected.
- `src/index.js` (safe): No malicious patterns detected
- `src/node.js` (safe): No malicious patterns detected

## Version ranges

None of the 5 scanned versions of debug are flagged high or critical. The latest scanned version, 4.4.3, is clean. Only versions we have scanned are listed; unscanned versions between them are not covered.

- 4.4.3 (`4.4.3`): clean
- 4.4.1 (`4.4.1`): not scanned
- 4.3.7 (`4.3.7`): clean
- 4.3.5 (`4.3.5`): not scanned
- 3.2.7 – 4.3.4 (`>=3.2.7 <=4.3.4`): clean
- 2.6.9 (`2.6.9`): medium

## Scanned versions

- [4.4.3](https://security.togoder.click/npm/debug@4.4.3): safe, 2026-10-04T14:37:25.000Z
- [4.3.7](https://security.togoder.click/npm/debug@4.3.7): safe, 2026-10-04T16:28:21.000Z
- [4.3.4](https://security.togoder.click/npm/debug@4.3.4): safe, 2026-10-04T16:08:36.000Z
- [3.2.7](https://security.togoder.click/npm/debug@3.2.7): safe, 2026-10-06T14:16:19.000Z
- [2.6.9](https://security.togoder.click/npm/debug@2.6.9): medium, 2026-10-04T16:27:08.000Z

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