NULL Pointer Dereference

Overview qs is a querystring parser that supports nesting and arrays, with a depth limit. Affected versions of this package are vulnerable to NULL Pointer Dereference in the stringify function, when processing arrays with the options arrayFormat: 'comma' and encodeValuesOnly: true that contain nu...

CVE-2026-8723

The CVE describes a bug in the qs library where tstringifying an object with arrayFormat: 'comma' and encodeValuesOnly: true fails if an array contains null or undefined. The failure is a synchronous TypeError caused by missing null guard in the encoding path: the code maps values with the encode...

CVE-2026-8723 qs.stringify crashes on null/undefined entries in comma-format arrays under encodeValuesOnly

Summary qs.stringify throws TypeError when called with arrayFormat: 'comma' and encodeValuesOnly: true on an array containing null or undefined. The throw is synchronous and not handled by any of qs's null-related options skipNulls, strictNullHandling. Details In the comma + encodeValuesOnly...