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cve record

CVE-2026-19489

CVSS—
Severitynone
Weakness—
ExploitedNot in CISA KEV

Description

References

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Our coverage of CVE-2026-19489

CVE-2026-19490critical

Citrix urges customers to fix critical NetScaler authentication bypass (CVE-2026-19490)

Citrix has released patches for two critical vulnerabilities affecting its NetScaler ADC and NetScaler Gateway products. The most severe, CVE-2026-19490, is an authentication bypass flaw with a CVSS score of 9.3 that could allow attackers to bypass login checks under specific configuration conditions. A second vulnerability, CVE-2026-19489, is a memory overflow issue with a CVSS score of 8.8 that can lead to denial of service.

CVE-2026-19489critical

Critical NetScaler Flaw Can Bypass Authentication on Certain Gateway and AAA Servers

Citrix has released critical security updates for NetScaler ADC and NetScaler Gateway to address two vulnerabilities. The most severe, CVE-2026-19490 (CVSS 9.3), allows for authentication bypass on specific configurations, including those acting as Gateways or AAA servers with SAML actions. A second flaw, CVE-2026-19489 (CVSS 8.8), is a memory overflow leading to potential denial-of-service when the SIP ALG is enabled.