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.

CVSS v3 8.7 HIGH

8.7^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.3 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/Cap-go/capgo/security/advisories/GHSA-jhjh-vp9p-54fg
https://www.vulncheck.com/advisories/capgo-account-takeover-via-cross-domain-sso-email-assertion-in-provision-user
https://github.com/Cap-go/capgo/security/advisories/GHSA-jhjh-vp9p-54fg

Configurations

No configuration.

History

No history.

Information

Published : 2026-06-24 13:16

Updated : 2026-06-25 14:03

NVD link : CVE-2026-56223

Mitre link : CVE-2026-56223

CVE.ORG link : CVE-2026-56223

JSON object : View

Products Affected

No product.

CWE

CWE-287

Improper Authentication

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