CVE-2026-109372
ZITADEL 3.0.0 before 4.19.2 Account Takeover via SAML Identity-Provider Confusion
CVSS Score
8.7
EPSS Score
0.0%
EPSS Percentile
0th
ZITADEL 4.x before 4.19.2 and 3.x through 3.4.15 contains an authentication bypass in the SAML identity-provider intent callback, which verifies the assertion signature using the provider named in the request URL but resolves the user from the login intent without checking they match. Attackers with organization-administrator permission can register a SAML provider with their own signing key to obtain authenticated sessions as any user linked to another SAML provider on the instance, including in other organizations.
| CWE | CWE-287 |
| Vendor | zitadel |
| Product | zitadel |
| Published | Oct 12, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
zitadel / zitadel
3.0.0 < 4.19.2
References
Credits
livio-a IAM-marco 🔍 everping 🔍 AdamKorcz