{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-56223", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-06-19T21:46:58.630Z", "datePublished": "2026-06-24T11:53:08.057Z", "dateUpdated": "2026-09-17T17:54:21.534Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-17T17:54:21.534Z" }, "datePublic": "2026-05-07T00:00:00.000Z", "title": "Capgo - Account Takeover via Cross-Domain SSO Email Assertion in provision-user", "descriptions": [ { "lang": "en", "value": "Capgo before 12.128.2 contains a cross-domain SSO account takeover vulnerability in the provision-user endpoint that allows attackers to merge arbitrary victim accounts based on email match without validating SSO provider domain authorization. An attacker with enterprise org admin access and a malicious IdP can forge SAML assertions containing victim email addresses to trigger account merge and gain full access to victim accounts, organizations, and data." } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "Improper Authentication", "cweId": "CWE-287", "type": "CWE" } ] } ], "affected": [ { "vendor": "Capgo", "product": "Capgo", "defaultStatus": "unaffected", "packageURL": "pkg:github/Cap-go/capgo", "versions": [ { "version": "0", "status": "affected", "versionType": "semver", "lessThan": "12.128.2" }, { "version": "12.128.2", "status": "unaffected", "versionType": "semver" } ] } ], "metrics": [ { "format": "CVSS", "cvssV4_0": { "version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "baseScore": 9.3, "baseSeverity": "CRITICAL" } }, { "format": "CVSS", "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH" } } ], "references": [ { "url": "https://github.com/Cap-go/capgo/security/advisories/GHSA-jhjh-vp9p-54fg", "name": "GitHub Security Advisory (GHSA-jhjh-vp9p-54fg)", "tags": [ "vendor-advisory" ] }, { "name": "VulnCheck Advisory: Capgo - Account Takeover via Cross-Domain SSO Email Assertion in provision-user", "tags": [ "third-party-advisory" ], "url": "https://www.vulncheck.com/advisories/capgo-account-takeover-via-cross-domain-sso-email-assertion-in-provision-user" } ], "credits": [ { "lang": "en", "value": "offset", "type": "reporter" } ], "x_generator": { "engine": "vulncheck-endgame" } }, "adp": [ { "references": [ { "url": "https://github.com/Cap-go/capgo/security/advisories/GHSA-jhjh-vp9p-54fg", "tags": [ "exploit" ] } ], "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-06-24T13:45:44.261860Z", "id": "CVE-2026-56223", "options": [ { "Exploitation": "poc" }, { "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": "2026-06-24T13:46:06.984Z" } } ] } }