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CVE-2026-4368 is a race condition vulnerability in Citrix NetScaler ADC and NetScaler Gateway that can cause user session mixup. The issue occurs when the appliance is configured as a Gateway, including SSL VPN, ICA Proxy, CVPN, or RDP Proxy, or as an AAA virtual server. Available reporting describes the flaw as a time-of-check/time-of-use style session-management race condition that can incorrectly associate one user with another user’s authenticated session context. The vulnerable condition has been reported for NetScaler ADC and NetScaler Gateway 14.1-66.54 under the affected configurations. Successful exploitation can result in one user being mapped to another user’s active session, creating unintended cross-user access and exposure of session-associated data.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
61 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A NetScaler session-management time-of-check/time-of-use session mixup vulnerability mentioned as an alternative hypothesis for session crossover, but ruled out in these incidents.
A separate NetScaler session-management flaw mentioned only to exclude it as the cause of the observed session hijacking in these incidents.
A separate Citrix NetScaler vulnerability, described in the content as a race condition in session management that can lead to session mix-ups and compromise confidentiality and integrity.
A Citrix NetScaler race condition vulnerability that can cause session mix-ups.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.