CVE-2026-56666

MEDIUM

ZITADEL: Auto-linking by email: IdP-side email verification is not checked

Title source: cna
STIX 2.1

Description

ZITADEL is an open source identity management platform. Prior to 4.15.3, ZITADEL's external identity provider handler checks that the local user's email is verified but does not verify that the external IdP confirmed ownership of the same email before auto-linking by email, allowing a permissive provider account with a victim email address to be linked to the victim's local account. This issue is fixed in version 4.15.3.

References (3)

Core 3

Scores

CVSS v3 4.8
EPSS 0.0019
EPSS Percentile 8.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-287
Status published
Products (1)
zitadel/zitadel < 4.15.3
Published Jul 10, 2026
Tracked Since Jul 10, 2026