{"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": "2026-07-10T17:15:44.783Z"}, "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"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.15.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "zitadel", "source": "cna", "vendor": "zitadel"}, "product": "zitadel", "vendor": "zitadel"}], "created": "2026-07-10T20:30:04.774221+00:00", "updated": "2026-07-10T20:30:04.774240+00:00", "vendors": ["zitadel", "zitadel$PRODUCT$zitadel"]}