CVE-2026-13474

Denial of service via malformed HTTP/2 requests

State: Published
Severity: 8.7 High
Published: Jun 30, 2026
Updated: Jun 30, 2026
Reserved: Jun 26, 2026

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

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L	NetScaler

Weaknesses

CWE-401 Missing release of memory after effective lifetime

Affected Products

Product	Versions
ADCNetScaler	14.1 to before 72.61Affected 13.1 to before 63.18Affected 14.1 FIPS to before 72.61Affected 13.1 FIPS and NDcPP to before 37.272Affected
GatewayNetScaler	14.1 to before 72.61Affected 13.1 to before 63.18Affected

References

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604

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