CVE-2026-109372 ZITADEL - Authentication Bypass

ZITADEL 4.x < 4.19.2 and 3.x <= 3.4.15 contain an authentication bypass caused by improper assertion signature verification in the SAML identity-provider intent callback, letting attackers with organization-administrator permission authenticate as any user linked to another SAML provider, exploit requires organization-administrator privileges.

CVSS base score 8.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.37% 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:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Published
12 October 2026
Updated
15 October 2026
Weakness
CWE-287

Vendor fix

Upgrade to version 4.19.2 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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