CVE-2026-55672ZITADEL: Missing client_id binding in OIDC authorization code exchange and refresh token flows (RFC 6749 Section 4.1.3 violation)
- 7.4HighCVSS base score
- 0.43%Exploitation in 30 daysEPSS · top 62% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By GitHub_M
- 23 days later
· 23 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
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 (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.
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
References5
- 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)
- EUVD EUVD-2026-42979 (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://cveledger.app/cve/CVE-2026-55672)Record last updated .