What is CVE-2026-56223?

CVE-2026-56223 is a high-severity vulnerability in Capgo, classified under Improper Authentication. CVSS score: 8.7/10. Published 2026-06-24.

How severe is CVE-2026-56223?

High severity. CVSS v3 base score is 8.7 out of 10.

Auth bypass in Capgo

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 authorizat…

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N.

Affected products

Capgo — versions 0, 12.128.2

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-56223?: CVE-2026-56223 is a high-severity vulnerability in Capgo, classified under Improper Authentication. CVSS score: 8.7/10. Published 2026-06-24.
How severe is CVE-2026-56223?: High severity. CVSS v3 base score is 8.7 out of 10.