Is CVE-2026-88773 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-88773 being exploited in the wild.

How severe is CVE-2026-88773?

Informational severity, published 27 September 2026.

Which products and versions are affected?

Citrix NetScaler ADC before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1-37.279 NDcPP; Citrix NetScaler Gateway before 14.1-73.37 FIPS and before 13.1-64.23.

Is there a fix for CVE-2026-88773?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-88773 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-88773?

Check whether you run Citrix NetScaler ADC or Citrix NetScaler Gateway at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-88773: Citrix NetScaler ADC HTTP Request/Response smuggling

CVE-2026-88773 · Severity: info · Published 2026-09-27

Citrix NetScaler ADC and Gateway are application delivery controllers that sit between clients and backend servers, processing and optimizing HTTP traffic. An HTTP request smuggling vulnerability could allow an attacker to inject malicious requests that bypass security controls or cause requests to be routed to unintended backends, potentially leading to cache poisoning, session hijacking, or unauthorized access to sensitive data.

Technologies: Citrix NetScaler ADC, Citrix NetScaler Gateway. Vendors: Citrix.

Quick answers

Is CVE-2026-88773 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-88773 being exploited in the wild.
How severe is CVE-2026-88773?: Informational severity, published 27 September 2026.
Which products and versions are affected?: Citrix NetScaler ADC before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1-37.279 NDcPP; Citrix NetScaler Gateway before 14.1-73.37 FIPS and before 13.1-64.23.
Is there a fix for CVE-2026-88773?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-88773 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-88773?: Check whether you run Citrix NetScaler ADC or Citrix NetScaler Gateway at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

This HTTP Request/Response smuggling vulnerability arises from inconsistent interpretation of HTTP requests in NetScaler ADC and Gateway. An attacker with network access can craft specially-formed HTTP requests that are parsed differently by the proxy and backend server, allowing request desynchronization. The vulnerability affects multiple versions before specified patch levels and can be exploited to bypass security policies or access restricted resources.

Affected products

Citrix NetScaler ADC before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1-37.279 NDcPP
Citrix NetScaler Gateway before 14.1-73.37 FIPS and before 13.1-64.23

Timeline

2026-09-27: disclosed

References

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

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