{"cve":"CVE-2026-55670","nvd":{"published":"2026-07-10T18:16:23.360","modified":"2026-07-10T21:16:56.973","status":"Deferred","description":"ZITADEL is an open source identity management platform. Prior to 4.15.1, ZITADEL's event store validation can retain the original resource owner for a deleted user identifier, causing a later user recreated with the same identifier in another organization to be provisioned under the original organization and exposed to that organization's administrator. This issue is fixed in version 4.15.2.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","score":2.3},"cvss_v3":null,"cwes":["CWE-284","CWE-639"],"references":["https://github.com/zitadel/zitadel/commit/a939b847d90c3370bd162064e57764b89c01be46","https://github.com/zitadel/zitadel/pull/12261","https://github.com/zitadel/zitadel/releases/tag/v4.15.2","https://github.com/zitadel/zitadel/security/advisories/GHSA-6x8v-2fq5-2229"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:44:02.134301115+00:00"},"epss":{"cve":"CVE-2026-55670","score":0.00362,"percentile":0.3,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-6x8v-2fq5-2229","url":"https://osv.dev/vulnerability/GHSA-6x8v-2fq5-2229","summary":" ZITADEL: Cross-Tenant User Leakage via Recycled Identifiers","modified":"2026-06-25T19:56:24.806726111Z","packages":[{"ecosystem":"Go","name":"github.com/zitadel/zitadel","purl":"pkg:golang/github.com/zitadel/zitadel","ranges":["<1.80.0-v2.20.0.20260615092437-6082e59d47c1"],"fixed":["1.80.0-v2.20.0.20260615092437-6082e59d47c1"]}]},{"id":"GO-2026-5197","url":"https://osv.dev/vulnerability/GO-2026-5197","summary":"ZITADEL: Cross-Tenant User Leakage via Recycled Identifiers in github.com/zitadel/zitadel","modified":"2026-06-25T19:45:13.920252668Z","packages":[{"ecosystem":"Go","name":"github.com/zitadel/zitadel","purl":"pkg:golang/github.com/zitadel/zitadel","ranges":["<1.80.0-v2.20.0.20260615092437-6082e59d47c1"],"fixed":["1.80.0-v2.20.0.20260615092437-6082e59d47c1"]}]}],"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."]}