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CVE-2026-88773HTTP Request Smuggling
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.
9.3 CRITICALEPSS 3.08%Not in KEVNVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 9.3 | CRITICAL | 4.0NetScaler (CNA) | 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 |
| 10.0 | CRITICAL | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N |
Details
- CVE ID
- CVE-2026-88773
- Status
- Analyzed
- Assigner (CNA)
- NetScaler
- Published
- Sep 27, 2026
- Last modified
- 2026-09-29 16:17 UTC
- Weaknesses
- CWE-444 · Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')
Affected Products
As published by the CNA in the CVE record.
Citrix NetScalerADC4 version ranges
- before 14.1-73.37
- before 13.1-64.23
- before 14.1-73.37 FIPS
- before 13.1-37.279 and NDcPP
Citrix NetScalerGateway2 version ranges
- before 14.1-73.37 FIPS
- before 13.1-64.23