CVE-2026-56666: 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 ve
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.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-56666
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-56666 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for ZITADEL is an
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highCVE-2026-56668: ZITADEL is an open source identity management platform. Prior to 4.15.3, ZITADEL's OAuth2 Toke…nvd · 2026-07-10
- highCVE-2026-56667: ZITADEL is an open source identity management platform. Prior to 4.15.3, ZITADEL Login V2 OIDC…nvd · 2026-07-10
- mediumCVE-2026-56665: ZITADEL is an open source identity management platform. Prior to 3.4.12 and 4.15.2, ZITADEL is…nvd · 2026-07-10
- mediumCVE-2026-56664: ZITADEL is an open source identity management platform. Prior to 3.4.12 and 4.15.2, ZITADEL's …nvd · 2026-07-10
- highCVE-2026-55672: ZITADEL is an open source identity management platform. Prior to 3.4.12 and 4.15.2, ZITADEL's …nvd · 2026-07-10
- unknownCVE-2026-55671: ZITADEL is an open source identity management platform. From 4.0.0-rc.1 through 4.15.1, ZITADE…nvd · 2026-07-10
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