CVE-2026-56223
Capgo - Account Takeover via Cross-Domain SSO Email Assertion in provision-user
CVSS Score
8.7
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-287 |
| Vendor | capgo |
| Product | capgo |
| Published | Jun 24, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
Capgo / Capgo
0 < 12.128.2
References
Credits
🔍 offset