{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-56666", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-22T16:39:01.043Z", "datePublished": "2026-07-10T17:37:37.137Z", "dateUpdated": "2026-07-13T18:09:47.186Z"}, "containers": {"cna": {"title": "ZITADEL: Auto-linking by email: IdP-side email verification is not checked", "problemTypes": [{"descriptions": [{"cweId": "CWE-287", "lang": "en", "description": "CWE-287: Improper Authentication", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/zitadel/zitadel/security/advisories/GHSA-992q-9gwp-7r79", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/zitadel/zitadel/security/advisories/GHSA-992q-9gwp-7r79"}, {"name": "https://github.com/zitadel/zitadel/commit/c97012f0c5dc2fe960ae6e940cbea23229f0557f", "tags": ["x_refsource_MISC"], "url": "https://github.com/zitadel/zitadel/commit/c97012f0c5dc2fe960ae6e940cbea23229f0557f"}, {"name": "https://github.com/zitadel/zitadel/releases/tag/v4.15.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/zitadel/zitadel/releases/tag/v4.15.3"}], "affected": [{"vendor": "zitadel", "product": "zitadel", "versions": [{"version": "< 4.15.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-10T17:37:37.137Z"}, "descriptions": [{"lang": "en", "value": "ZITADEL is an open source identity management platform. Prior to 4.15.3, ZITADEL's external identity provider handler checks that the local user's email is verified but does not verify that the external IdP confirmed ownership of the same email before auto-linking by email, allowing a permissive provider account with a victim email address to be linked to the victim's local account. This issue is fixed in version 4.15.3."}], "source": {"advisory": "GHSA-992q-9gwp-7r79", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-13T18:09:40.948313Z", "id": "CVE-2026-56666", "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": "2026-07-13T18:09:47.186Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-56666", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-13T18:09:40.948313Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-13T18:09:43.700Z"}}], "cna": {"title": "ZITADEL: Auto-linking by email: IdP-side email verification is not checked", "source": {"advisory": "GHSA-992q-9gwp-7r79", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}], "affected": [{"vendor": "zitadel", "product": "zitadel", "versions": [{"status": "affected", "version": "< 4.15.3"}]}], "references": [{"url": "https://github.com/zitadel/zitadel/security/advisories/GHSA-992q-9gwp-7r79", "name": "https://github.com/zitadel/zitadel/security/advisories/GHSA-992q-9gwp-7r79", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/zitadel/zitadel/commit/c97012f0c5dc2fe960ae6e940cbea23229f0557f", "name": "https://github.com/zitadel/zitadel/commit/c97012f0c5dc2fe960ae6e940cbea23229f0557f", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/zitadel/zitadel/releases/tag/v4.15.3", "name": "https://github.com/zitadel/zitadel/releases/tag/v4.15.3", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "ZITADEL is an open source identity management platform. Prior to 4.15.3, ZITADEL's external identity provider handler checks that the local user's email is verified but does not verify that the external IdP confirmed ownership of the same email before auto-linking by email, allowing a permissive provider account with a victim email address to be linked to the victim's local account. This issue is fixed in version 4.15.3."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-287", "description": "CWE-287: Improper Authentication"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-10T17:37:37.137Z"}}}, "cveMetadata": {"cveId": "CVE-2026-56666", "state": "PUBLISHED", "dateUpdated": "2026-07-13T18:09:47.186Z", "dateReserved": "2026-06-22T16:39:01.043Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-07-10T17:37:37.137Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.15.3)"}}], "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": "2026-07-10T19:30:04.401591+00:00", "updated": "2026-07-13T19:30:04.469579+00:00", "vendors": ["zitadel", "zitadel$PRODUCT$zitadel"]}