CVE-2026-119128 ZITADEL - Authentication Bypass

ZITADEL 4.0.0 before 4.19.5 contains an authentication bypass caused by a flaw in the Login V2 UI allowing unauthenticated attackers to set the first credential for users without authentication methods, letting attackers take over accounts by computing a valid verificationCheck cookie from user ID and browser fingerprint.

CVSS base score 7.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.29% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
29 October 2026
Updated
31 October 2026
Weakness
CWE-565

Vendor fix

Upgrade to version 4.19.5 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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