CVE-2026-88774

Published Sep 27, 2026

Last updated 5 hours ago

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-88774 is a policy bypass vulnerability affecting Citrix NetScaler ADC and NetScaler Gateway appliances. This flaw stems from improper usage of HTTP URL-based expressions, which can allow non-normalized URLs to bypass Web Application Firewall (WAF) or other security rules. The vulnerability specifically impacts appliances where any policy is configured to use an HTTP URL-based expression. Citrix has addressed this issue with security updates, with the fix being included in builds starting from 14.1-72.

Description: 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 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to a feature policy bypass due to improper HTTP URL based expression usage.
Source: 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5
NVD status: Modified
Products: netscaler_application_delivery_controller, netscaler_gateway

Risk scores

CVSS 4.0

Type: Secondary
Base score: 7
Impact score: -
Exploitability score: -
Vector string: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Severity: HIGH

CVSS 3.1

Type: Primary
Base score: 7.2
Impact score: 2.7
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Severity: HIGH

Weaknesses

nvd@nist.gov: NVD-CWE-noinfo
134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-20

Hype score is a measure of social media activity compared against trending CVEs from the past 12 months. Max score 100.

Hype score: 2

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*",
            "matchCriteriaId": "6BC2D462-9ABE-4024-8E46-8D265C0B19FB",
            "versionEndExcluding": "13.1-64.23",
            "versionStartIncluding": "13.1",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*",
            "matchCriteriaId": "2DB314FE-3886-4ABD-A820-B8A70EBB23A6",
            "versionEndExcluding": "13.1.37.279",
            "versionStartIncluding": "13.1",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*",
            "matchCriteriaId": "FCFFA1B3-87CE-4CC8-990E-D3CE0B55CD45",
            "versionEndExcluding": "13.1.37.279",
            "versionStartIncluding": "13.1",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*",
            "matchCriteriaId": "1CA9588A-E3EB-44FC-9515-6EB89BB8C1D6",
            "versionEndExcluding": "14.1-73.37",
            "versionStartIncluding": "14.1",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*",
            "matchCriteriaId": "046FF602-D956-4961-89BF-2041A3590004",
            "versionEndIncluding": "14.1-73.37",
            "versionStartIncluding": "14.1-66.68",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "3286D2C3-EA7E-4D9C-95DE-05D462DC8B1B",
            "versionEndExcluding": "13.1-64.23",
            "versionStartIncluding": "13.1",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "C77243A7-1FDB-4557-88BE-EDF3BAA56A81",
            "versionEndExcluding": "14.1-73.37",
            "versionStartIncluding": "14.1",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.