CVE-2026-55672

HIGH7.4

ZITADEL: Missing client_id binding in OIDC authorization code exchange and refresh token flows (RFC 6749 Section 4.1.3 violation)

Published Jul 10, 2026

Modified 3 months ago

Details

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.

References

WEB

https://github.com/zitadel/zitadel/commit/562403079a98cf2059cdac11865a45e2f285be71

WEB

https://github.com/zitadel/zitadel/commit/5b1708e0e650398f0ebc3341714f0798b0118917

WEB

https://github.com/zitadel/zitadel/releases/tag/v3.4.12

WEB

https://github.com/zitadel/zitadel/releases/tag/v4.15.2

WEB

https://github.com/zitadel/zitadel/security/advisories/GHSA-xqxv-4jc2-x56x

ADVISORY