CVE-2026-88773 Citrix NetScaler ADC & Gateway - HTTP Request Smuggling

Citrix NetScaler ADC and Gateway before 14.1-73.37 and 13.1-64.23 contain an HTTP request smuggling vulnerability caused by inconsistent interpretation of HTTP requests, letting attackers perform request smuggling attacks, exploit requires crafted HTTP requests.

CVSS base score 10.0 /10
Critical
CISA KEV
Not listed
Public exploit
Proof of concept available
Authentication
Not required
EPSS
0.36% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
HTTP Request Smuggling
Impact
HTTP Request Smuggling
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Published
27 September 2026
Updated
15 October 2026
Weakness
CWE-444

Vendor fix

Upgrade to versions 14.1-73.37, 13.1-64.23 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs