# qs@6.11.0 security report (npm)

- Verdict: **No issues** (risk level: safe)
- Scanned: 2026-10-04T16:51:34.000Z
- Files reviewed: 6
- Findings: 2 low severity findings
- Report: https://security.togoder.click/npm/qs@6.11.0
- Source: Togoder Security (https://security.togoder.click), AI source-code review

## Summary

Togoder Security scanned the npm package qs@6.11.0 on Oct 4, 2026. An AI review of 6 source files produced 2 low severity findings. No malicious behavior, install-time payloads, credential theft or exfiltration were identified.

## Findings

### [low] prototype pollution protection

Finding ID: `NPS-ACEB0C49D63D`

File: `lib/parse.js`

The code explicitly checks against '__proto__' and Object.prototype properties before assigning keys, preventing prototype pollution. This is a security-conscious implementation, not a vulnerability.

### [low] regex safety

Finding ID: `NPS-2257D63EFBFB`

File: `lib/parse.js`

Regular expressions used for bracket/dot parsing are simple with bounded character classes, not vulnerable to ReDoS under normal input sizes.

## Files reviewed

- `dist/qs.js` (safe): No malicious patterns detected; the code is the standard qs library bundle for query string parsing/stringification.
- `lib/formats.js` (safe): Cleared by Jev triage; no further analysis needed
- `lib/index.js` (safe): Cleared by Jev triage; no further analysis needed
- `lib/parse.js` (safe): This is a standard querystring parsing module (qs-style) with proper prototype pollution guards and no malicious patterns detected.
- `lib/stringify.js` (safe): Cleared by Jev triage; no further analysis needed
- `lib/utils.js` (safe): No malicious patterns detected; the code is a standard set of utility functions for URL encoding/decoding and object merging, typical of the qs library, with no network, filesystem, or process execution activity.

## Version ranges

None of the 3 scanned versions of qs are flagged high or critical. The latest scanned version, 6.16.0, is clean. Only versions we have scanned are listed; unscanned versions between them are not covered.

- 6.16.0 (`6.16.0`): clean
- 6.14.0 (`6.14.0`): medium (Prototype pollution)
- 6.13.0 (`6.13.0`): not scanned
- 6.11.0 (`6.11.0`): clean

## Scanned versions

- [6.16.0](https://security.togoder.click/npm/qs@6.16.0): safe, 2026-10-04T14:40:45.000Z
- [6.14.0](https://security.togoder.click/npm/qs@6.14.0): medium, 2026-10-04T16:39:45.000Z
- [6.11.0](https://security.togoder.click/npm/qs@6.11.0): safe, 2026-10-04T16:51:34.000Z

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