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CVE-2026-55672
ZITADEL: Missing client_id binding in OIDC authorization code exchange and refresh token flows (RFC 6749 Section 4.1.3 violation)
High7.4EPSS 0.43%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVDNVD · Deferred | 3.1 | High7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.43% · top 62% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.
Weakness
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/zitadel/zitadelGHSA-xqxv-4jc2-x56x (opens in a new tab)
References (5)
- https://github.com/zitadel/zitadel/security/advisories/GHSA-xqxv-4jc2-x56x (opens in a new tab)x_refsource_CONFIRM
- https://github.com/zitadel/zitadel/commit/562403079a98cf2059cdac11865a45e2f285be71 (opens in a new tab)x_refsource_MISC
- https://github.com/zitadel/zitadel/commit/5b1708e0e650398f0ebc3341714f0798b0118917 (opens in a new tab)x_refsource_MISC
- https://github.com/zitadel/zitadel/releases/tag/v3.4.12 (opens in a new tab)x_refsource_MISC
- https://github.com/zitadel/zitadel/releases/tag/v4.15.2 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-xqxv-4jc2-x56x (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-55672)Record last updated .