CVE-2026-56666
Medium
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.
SeverityMedium
CVSS4.8
Exploit probability—
ProductGithub.com/zitadel/zitadel
PublishedJul 10, 2026
First seenJul 10, 2026
Weakness typeCWE-287Improper authentication
How to fix
Update
- github.com/zitadel/zitadel4.15.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| github.com/zitadel/zitadelGo | v < 4.15.3, No range specified | 4.15.3 |
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