CVE-2026-13474: 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…

PriorityP342high7.5CVSS 3.1

AVNACLPRNUINSUCNINAH

EPSS

0.56%

44.5th percentile

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

Affected

19 ranges

Vendor	Product	Version range	Fixed in
citrix	citrix_adm	—	—
citrix	citrix_hypervisor	—	—
citrix	citrix_virtual_apps_and_desktops	—	—
citrix	endpoint_management	—	—
citrix	netscaler_adc	—	—
citrix	netscaler_application_delivery_controller	< 13.1-37.272	13.1-37.272
citrix	netscaler_application_delivery_controller	—	—
citrix	netscaler_application_delivery_controller	>= 13.1 < 13.1-63.18	13.1-63.18
citrix	netscaler_application_delivery_controller	>= 14.1 < 14.1-72.61	14.1-72.61
citrix	netscaler_gateway	—	—
citrix	netscaler_gateway	>= 13.1 < 13.1-63.18	13.1-63.18
citrix	netscaler_gateway	>= 14.1 < 14.1-72.61	14.1-72.61
citrix	xenserver	—	—
netscaler	adc	>= 13.1 < 63.18	63.18
netscaler	adc	>= 13.1 FIPS and NDcPP < 37.272	37.272
netscaler	adc	>= 14.1 < 72.61	72.61
netscaler	adc	>= 14.1 FIPS < 72.61	72.61
netscaler	gateway	>= 13.1 < 63.18	63.18
netscaler	gateway	>= 14.1 < 72.61	72.61

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvdv4.08.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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

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