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


Could not find any relations

Weaknesses



CWE-287

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

[email protected]

Vulnerability status

Deferred

Published

2026-10-12T17:17:34.800Z

1 hour ago

Last modified

2026-10-12T17:17:35.053Z

1 hour ago