CVE-2026-55672
HIGHZITADEL: Missing client_id binding in OIDC authorization code exchange and refresh token flows (RFC 6749 Section 4.1.3 violation)
Title source: cnaDescription
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 (5)
Core 5
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/zitadel/zitadel/security/advisories/GHSA-xqxv-4jc2-x56x
X_Refsource_Misc x_refsource_misc
https://github.com/zitadel/zitadel/commit/562403079a98cf2059cdac11865a45e2f285be71
X_Refsource_Misc x_refsource_misc
https://github.com/zitadel/zitadel/commit/5b1708e0e650398f0ebc3341714f0798b0118917
X_Refsource_Misc x_refsource_misc
https://github.com/zitadel/zitadel/releases/tag/v3.4.12
X_Refsource_Misc x_refsource_misc
https://github.com/zitadel/zitadel/releases/tag/v4.15.2
Scores
CVSS v3
7.4
EPSS
0.0028
EPSS Percentile
19.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-287
CWE-863
Status
published
Products (3)
zitadel/zitadel
0 - 1.80.0-v2.20.0.20260616131956-0973b074b488Go
zitadel/zitadel
< 3.4.12
zitadel/zitadel
>= 4.0.0-rc.1, < 4.15.2
Published
Jul 10, 2026
Tracked Since
Jul 10, 2026