Uncaught Exception Affecting qs package, versions >=6.7.0 <6.16.1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-JS-QS-20943482
- published15 Oct 2026
- disclosed14 Oct 2026
- creditmanus-pi, Lucidsec
Introduced: 14 Oct 2026
NewCVE-2026-110816 (opens in a new tab)How to fix?
Upgrade qs to version 6.16.1 or higher.
Overview
qs is a querystring parser that supports nesting and arrays, with a depth limit.
Affected versions of this package are vulnerable to Uncaught Exception via stringify when arrayFormat: 'comma' is used with array elements that have a non-callable toString property. Such elements - as produced by JSON.parse, or by qs.parse under allowPrototypes or plainObjects (which yields null-prototype objects) - cause Array.prototype.join or utils.encode to throw a TypeError: Cannot convert object to primitive value, crashing the process.
Note: This is only exploitable if the arrayFormat: 'comma' option is explicitly set.