PT-2026-51765 · Cap Go · Cap-Go

Offset · Published 2026-06-24 · Updated 2026-06-24 · CVE-2026-56223

NVD

CVSS v3.1

8.7

High

Base vector

AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

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.

Exploit

Fix

Improper Authentication

Weakness Enumeration

CWE-287

Related Identifiers

CVE-2026-56223

Affected Products

Cap-Go

References · 3

• 🔥 https://github.com/Cap-go/capgo/security/advisories/GHSA-jhjh-vp9p-54fg · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-56223 · Security Note
• https://vulncheck.com/advisories/capgo-account-takeover-via-cross-domain-sso-email-assertion-in-provision-user · Note