Vulnerability Analysis
Capgo - Account Takeover via Cross-Domain SSO Email Assertion in provision-user
CVE-2026-56223
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.
No Active Exploit Signals
CVSS Base Score
9.3
CRITICAL
Exploitability:-
Impact Score:-
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EPSS:-
Threat Intelligence Signals
CISA KEV
No
KEV Date Added
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Ransomware Use
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KEV Due Date
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VulnCheck In-the-Wild
No
Nuclei Template
No
EPSS Score
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GHSA ID
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GitHub Severity
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SSVC Exploitation
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SSVC Automatable
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Identity & Timeline
| Status | - |
| Assigning Authority | - |
| CVSS Version / Source | - |
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| Patch Date (date_public) | - |
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| First GitHub PoC Date | - |
| Last Updated | - |
| Time to Patch (Days to fix) | - |
| Exploit Release Gap | - |
| PoC Release Gap | - |
| Exploit DB References | None identified |
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| No affected products specified. | ||
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