CVE-2025-15284

CVE Details

Visit the official vulnerability details page for CVE-2025-15284 to learn more.

Initial Publication

12/29/2025

Last Update

02/10/2026

Third Party Dependency

qs

NIST CVE Summary

Improper Input Validation vulnerability in qs (parse modules) allows HTTP DoS.This issue affects qs: < 6.14.1.

Summary

The arrayLimit option in qs did not enforce limits for bracket notation (a[]=1&a[]=2), only for indexed notation (a[0]=1). This is a consistency bug; arrayLimit should apply uniformly across all array notations.

Note: The default parameterLimit of 1000 effectively mitigates the DoS scenario originally described. With default options, bracket notation cannot produce arrays larger than parameterLimit regardless of arrayLimit, because each a[]=valueconsumes one parameter slot. The severity has been reduced accordingly.

Details

The arrayLimit option only checked limits for indexed notation (a[0]=1&a[1]=2) but did not enforce it for bracket notation (a[]=1&a[]=2).

Vulnerable code (lib/parse.js:159-162):

if (root === '[]' && options.parseArrays) { obj = utils.combine([], leaf); // No arrayLimit check }

Working code (lib/parse.js:175):

else if (index <= options.arrayLimit) { // Limit checked here obj = []; obj[index] = leaf; }

The bracket notation handler at line 159 uses utils.combine([], leaf) without validating against options.arrayLimit, while indexed notation at line 175 checks index <= options.arrayLimit before creating arrays.

PoC

const qs = require('qs'); const result = qs.parse('a[]=1&a[]=2&a[]=3&a[]=4&a[]=5&a[]=6', { arrayLimit: 5 }); console.log(result.a.length); // Output: 6 (should be max 5)

Note on parameterLimit interaction: The original advisory's "DoS demonstration" claimed a length of 10,000, but parameterLimit (default: 1000) caps parsing to 1,000 parameters. With default options, the actual output is 1,000, not 10,000.

Impact

Consistency bug in arrayLimit enforcement. With default parameterLimit, the practical DoS risk is negligible since parameterLimit already caps the total number of parsed parameters (and thus array elements from bracket notation). The risk increases only when parameterLimit is explicitly set to a very high value.

CVE Severity

3.7

Our Official Summary

Investigation is ongoing to determine how this vulnerability affects our products.

Status

Undergoing Analysis

Affected Products & Versions

Version	PaletteAI	PaletteAI VerteX
0.7.1	⚠️ Impacted	⚠️ Impacted
0.6.6	⚠️ Impacted	⚠️ Impacted
0.5.11	⚠️ Impacted	⚠️ Impacted

Revision History

No revisions available.