CVE-2026-56666

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.

PUBLISHED Reserved 2026-06-22 | Published 2026-07-10 | Updated 2026-07-13 | Assigner GitHub_M

Problem types

CWE-287: Improper Authentication

Product status

References

github.com/...itadel/security/advisories/GHSA-992q-9gwp-7r79

github.com/...ommit/c97012f0c5dc2fe960ae6e940cbea23229f0557f

github.com/zitadel/zitadel/releases/tag/v4.15.3

cve.org (CVE-2026-56666)

nvd.nist.gov (CVE-2026-56666)

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