qs array-limit bypass via bracket-key comma parsing — GHSA-X5FP-WJ9C-MXMX

Summary

### Summary `qs` `v6.15.3` allows bracket-key input to bypass `arrayLimit` and `throwOnLimitExceeded` when `comma: true`. The input `a[]=1,2,3,4` succeeds with `arrayLimit: 3`, while the equivalent plain-key input is rejected. Affected version tested: ```text qs v6.15.3 commit 18d085e919dae70c8f1b200ab99323058edab2c2 ``` ### Details `parseArrayValue()` enforces the comma limit only for flat values. The `a[]` form…

Timeline

Published by source

2026-09-02

Risk context

• Reported severity or threat level: medium.
• Reported CVSS score: 6.3 out of 10.
• Reported EPSS value: 0.00317.
• Review exposure for the affected product or family: npm: qs.

Product

npm: qs

What to do

General, cautious steps (verify details in the official source):

• Review exposure and plan remediation based on risk and environment.
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-X5FP-WJ9C-MXMX

Source

GitHub

Vendor

GitHub

Published by source

2026-09-02

Last source activity

2026-09-02

Additional identifiers

CVE-2026-82562

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.