CVE-2026-56223: Capgo

High severity, CVSS 8.7. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Capgo Capgo: before 12.128.2 (fixed in 12.128.2)

Published 2026-06-24. Last modified 2026-09-17.