#VU123997 Input validation error in qs - CVE-2026-2391

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Main Vulnerability Database Vulnerabilities #VU123997

#VU123997 Input validation error in qs - CVE-2026-2391

Published: March 13, 2026


Vulnerability identifier: #VU123997
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-2391
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
qs
Software vendor:
npm Inc.

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due the arrayLimit option in qs does not enforce limits for comma-separated values when comma: true is enabled. A remote attacker can pass overly large string to the application and consume all available memory resources, leading to a denial of service condition.



Remediation

Install updates from vendor's website.

External links