Main Vulnerability Database Vulnerabilities #VU152293

Inconsistent interpretation of HTTP requests in Citrix Netscaler ADC and Citrix NetScaler Gateway - CVE-2026-88773

Published: September 28, 2026

Vulnerability identifier: #VU152293

CSH Severity: High

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-88773

CWE-ID: CWE-444

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to modify information.

The vulnerability exists due to inconsistent interpretation of HTTP requests in HTTP configuration when handling HTTP requests. A remote attacker can send a smuggled HTTP request to modify information.

HTTP configuration must be enabled.

Affected software

Citrix Netscaler ADC
Citrix NetScaler Gateway

How to mitigate CVE-2026-88773

Install security update from vendor's website.

Citrix Netscaler ADC - addressed in versions 13.1-37.279, 13.1-64.23, 14.1-73.37
Citrix NetScaler Gateway - addressed in versions 13.1-64.23, 14.1-73.37

External References

Related Security Bulletins