Improper Encoding or Escaping of Output in qs - CVE-2026-110910
Published: November 9, 2026
Vulnerability identifier: #VU163101
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-110910
CWE-ID: CWE-116
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated remote attacker to inject parameters into application-generated query strings.
The vulnerability exists due to missing encoding of empty-array keys in qs.stringify when the non-default allowEmptyArrays option is enabled and key encoding is otherwise active. An unauthenticated remote attacker can supply crafted key names with empty-array values to an application that serializes untrusted keys, causing embedded query syntax to introduce parameters not present as separate object keys.
Affected software
qs
How to mitigate CVE-2026-110910
Install security update from vendor's website.
qs - addressed in versions 6.12.6, 6.13.4, 6.14.3, 6.15.4, 6.16.2