Check Point Advisories

Whyour Qinglong Authentication Bypass (CVE-2026-3965; CVE-2026-4047)

Vulnerability
Protection

Check Point Reference:	CPAI-2026-3805
Date Published:	30 Apr 2026
Severity:	High
Last Updated:	Thursday 30 April, 2026
Source:
Industry Reference:	CVE-2026-3965 CVE-2026-4047
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Whyour Qinglong 2.20.1 and prior
Vulnerability Description	An authentication bypass vulnerability exists in Whyour Qinglong. Successful exploitation of this vulnerability would allow remote attackers to gain unauthorized access into the affected system.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Whyour Qinglong Authentication Bypass protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Server Enforcement Violation.
Attack Information: Whyour Qinglong Authentication Bypass