Description
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.
Related CPE's
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References
CVSS impact metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
8.7 · High
Information
Source identifier
Vulnerability status
Deferred
Published
2026-10-12T17:17:34.800Z
1 hour agoLast modified
2026-10-12T17:17:35.053Z
1 hour ago