CVE-2026-55672: Zitadel

High severity, CVSS 7.4. EPSS: 0.4% chance of exploitation in the next 30 days.

ZITADEL is an open source identity management platform. Prior to 3.4.12 and 4.15.2, ZITADEL's OAuth2 and OIDC CodeExchange, RefreshToken, and device token flows fail to verify that the requesting client matches the client that initiated the authorization flow, allowing intercepted grants or refresh tokens to be exchanged under a different client. This issue is fixed in versions 3.4.12 and 4.15.2.

Affected products

• Zitadel Zitadel: from 4.0.0-rc.1, before 4.15.2 (fixed in 4.15.2); before 3.4.12 (fixed in 3.4.12)

Published 2026-07-10. Last modified 2026-07-10.