{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55670","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-17T00:05:03.777Z","datePublished":"2026-07-10T17:15:44.783Z","dateUpdated":"2026-07-10T20:58:36.084Z"},"containers":{"cna":{"title":"ZITADEL: Cross-Tenant User Leakage via Recycled Identifiers","problemTypes":[{"descriptions":[{"cweId":"CWE-284","lang":"en","description":"CWE-284: Improper Access Control","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":2.3,"baseSeverity":"LOW","vectorString":"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","version":"4.0"}}],"references":[{"name":"https://github.com/zitadel/zitadel/security/advisories/GHSA-6x8v-2fq5-2229","tags":["x_refsource_CONFIRM"],"url":"https://github.com/zitadel/zitadel/security/advisories/GHSA-6x8v-2fq5-2229"},{"name":"https://github.com/zitadel/zitadel/pull/12261","tags":["x_refsource_MISC"],"url":"https://github.com/zitadel/zitadel/pull/12261"},{"name":"https://github.com/zitadel/zitadel/commit/a939b847d90c3370bd162064e57764b89c01be46","tags":["x_refsource_MISC"],"url":"https://github.com/zitadel/zitadel/commit/a939b847d90c3370bd162064e57764b89c01be46"},{"name":"https://github.com/zitadel/zitadel/releases/tag/v4.15.2","tags":["x_refsource_MISC"],"url":"https://github.com/zitadel/zitadel/releases/tag/v4.15.2"}],"affected":[{"vendor":"zitadel","product":"zitadel","versions":[{"version":"< 4.15.2","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-10T17:15:44.783Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-6x8v-2fq5-2229","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-10T20:46:22.799188Z","id":"CVE-2026-55670","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-10T20:58:36.084Z"}}]}}