{"cve":"CVE-2026-55672","nvd":{"published":"2026-07-10T18:16:23.637","modified":"2026-07-10T19:17:25.983","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","score":7.4},"cwes":["CWE-287","CWE-863"],"references":["https://github.com/zitadel/zitadel/commit/562403079a98cf2059cdac11865a45e2f285be71","https://github.com/zitadel/zitadel/commit/5b1708e0e650398f0ebc3341714f0798b0118917","https://github.com/zitadel/zitadel/releases/tag/v3.4.12","https://github.com/zitadel/zitadel/releases/tag/v4.15.2","https://github.com/zitadel/zitadel/security/advisories/GHSA-xqxv-4jc2-x56x"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:44:02.134301115+00:00"},"epss":{"cve":"CVE-2026-55672","score":0.00433,"percentile":0.37613,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-xqxv-4jc2-x56x","url":"https://osv.dev/vulnerability/GHSA-xqxv-4jc2-x56x","summary":" ZITADEL: Missing client_id binding in OIDC authorization code exchange and refresh token flows (RFC 6749 Section 4.1.3 violation)","modified":"2026-07-15T22:00:52.768267515Z","packages":[{"ecosystem":"Go","name":"github.com/zitadel/zitadel","purl":"pkg:golang/github.com/zitadel/zitadel","ranges":["<1.80.0-v2.20.0.20260616131956-0973b074b488"],"fixed":["1.80.0-v2.20.0.20260616131956-0973b074b488"]}]},{"id":"GO-2026-5768","url":"https://osv.dev/vulnerability/GO-2026-5768","summary":"ZITADEL: Missing client_id binding in OIDC authorization code exchange and refresh token flows (RFC 6749 Section 4.1.3 violation) in github.com/zitadel/zitadel","modified":"2026-06-25T23:01:44.027610179Z","packages":[{"ecosystem":"Go","name":"github.com/zitadel/zitadel","purl":"pkg:golang/github.com/zitadel/zitadel","ranges":["<1.80.0-v2.20.0.20260616131956-0973b074b488"],"fixed":["1.80.0-v2.20.0.20260616131956-0973b074b488"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}