CVE-2026-13474 PUBLISHED

Denial of service via malformed HTTP/2 requests

Assigner: NetScaler
Reserved: 26.06.2026 Published: 30.06.2026 Updated: 30.06.2026

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

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	Low
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	NetScaler
Product	ADC
Versions	Default: unaffected affected from 14.1 to 72.61 (excl.) affected from 13.1 to 63.18 (excl.) affected from 14.1 FIPS to 72.61 (excl.) affected from 13.1 FIPS and NDcPP to 37.272 (excl.)

Vendor	NetScaler
Product	Gateway
Versions	Default: unaffected affected from 14.1 to 72.61 (excl.) affected from 13.1 to 63.18 (excl.)

References

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

Problem Types

CWE-401 Missing release of memory after effective lifetime CWE