CVE-2026-88773 PUBLISHED

HTTP Request Smuggling

Assigner: NetScaler
Reserved: 10.09.2026 Published: 27.09.2026 Updated: 29.09.2026

Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling') vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway.

This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1-37.279 and NDcPP; Gateway: before 14.1-73.37 FIPS and before 13.1-64.23.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Citrix NetScaler
Product	ADC
Versions	Default: unaffected affected from 0 to 14.1-73.37 (excl.) affected from 0 to 13.1-64.23 (excl.) affected from 0 to 14.1-73.37 FIPS (excl.) affected from 0 to 13.1-37.279 and NDcPP (excl.)

Vendor	Citrix NetScaler
Product	Gateway
Versions	Default: unaffected affected from 0 to 14.1-73.37 FIPS (excl.) affected from 0 to 13.1-64.23 (excl.)

References

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096

Problem Types

CWE-444 Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling') CWE