CVE-2026-13474
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Denial of Service in NetScaler ADC and Gateway via HTTP/2

Publication date: 2026-06-30

Last updated on: 2026-06-30

Assigner: 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5

Description
Denial of service via malformed HTTP/2 requests in NetScaler ADC and NetScaler Gateway if HTTP/2 is enabled in HTTP Profile and associated with the virtual server (of type LB, CS, VPN) or the service configured on NetScaler

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Meta Information

Published
2026-06-30
Last Modified
2026-06-30
Generated
2026-06-30
AI Q&A
2026-06-30
EPSS Evaluated
N/A
NVD
CVE-2026-13474
EUVD
EUVD-2026-40320

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
citrix netscaler_adc *
citrix netscaler_gateway *

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-401 The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

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Executive Summary

This vulnerability is a denial of service (DoS) issue that occurs when malformed HTTP/2 requests are sent to NetScaler ADC and NetScaler Gateway devices. It specifically affects these devices if HTTP/2 is enabled in the HTTP Profile and associated with the virtual server (such as load balancing, content switching, or VPN) or the service configured on NetScaler.

Impact Analysis

The impact of this vulnerability is a denial of service condition, which means that an attacker can send specially crafted malformed HTTP/2 requests to disrupt the normal operation of NetScaler ADC or NetScaler Gateway devices. This can cause the affected services or virtual servers to become unavailable, potentially leading to downtime or loss of access to critical network functions.

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