{"id":"CVE-2026-56223","title":"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 authoriz…","summary":"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 authoriz…","severity":"high","cvss":8.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N","cwe":["CWE-287"],"vendor":"Capgo","product":"Capgo","affected":["Capgo < 12.128.2"],"published":"2026-06-24","updated":"2026-09-17","sourceUpdated":"2026-09-17T18:16:49.943","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-56223","references":[{"url":"https://github.com/Cap-go/capgo/security/advisories/GHSA-jhjh-vp9p-54fg","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/capgo-account-takeover-via-cross-domain-sso-email-assertion-in-provision-user","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Cap-go/capgo/security/advisories/GHSA-jhjh-vp9p-54fg","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-06-24T13:45:44.261860Z"},"epss":0.00302,"epssPercentile":0.23082,"ingestedAt":"2026-09-17T18:25:15.973Z","slug":"CVE-2026-56223","body":"## Overview\n\nCapgo 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":60,"depthScoreParts":{"impact":47.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}