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 2
prototype pollution protection
NPS-ACEB0C49D63D
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.
regex safety
NPS-2257D63EFBFB
Regular expressions used for bracket/dot parsing are simple with bounded character classes, not vulnerable to ReDoS under normal input sizes.
Files reviewed
| File | Verdict | What the reviewer saw |
|---|---|---|
| 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. |
Affected 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.
| Versions | Verdict | Count | Range | Top findings |
|---|---|---|---|---|
| 6.16.0 | No issues | 1 | 6.16.0 | |
| 6.14.0 | Needs review | 1 | 6.14.0 | Prototype pollution |
| 6.13.0 | Not scanned | 1 | 6.13.0 | |
| 6.11.0 | No issues | 1 | 6.11.0 |
Full list, including published versions not scanned yet: version ranges API.
Scanned versions of qs
Frequently asked questions
Is qs safe to use?
Our AI source review of qs@6.11.0 found no malicious code: no install-time payloads, credential theft, exfiltration, obfuscated loaders or backdoors.
Does qs contain malware?
No malware was identified in qs@6.11.0 when Togoder Security scanned it on Oct 4, 2026. A new version can still introduce malicious code, so scan the exact versions in your lockfile.
How was qs checked?
Togoder Security downloaded the published npm package and had an AI model read its 6 source files, looking for install scripts, credential access, network exfiltration, obfuscation, backdoors and crypto-wallet theft. The results are cached by file hash and shown here.
How do I scan qs together with the rest of my dependencies?
Upload your lockfile at https://security.togoder.click/scan or call the API documented at https://security.togoder.click/api-docs. Files that have already been scanned, like the ones in qs@6.11.0, cost nothing.