What is CVE-2026-56312?

CVE-2026-56312 is a medium-severity vulnerability in Capgo, classified under Improper Authentication. CVSS score: 6.5/10. Published 2026-07-10.

How severe is CVE-2026-56312?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Capgo

CVE-2026-56312

Capgo before 12.128.2 contains an improper validation vulnerability in the accept_invitation endpoint that creates user accounts before captcha validation is enforced. Attackers can bypass captcha protection by sending POST requests with invalid captcha tokens to create unwanted accounts and burn invite links.

Vulnerability class: Broken Authentication

EPSS: 0.003 (20.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

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-2026-56312?: CVE-2026-56312 is a medium-severity vulnerability in Capgo, classified under Improper Authentication. CVSS score: 6.5/10. Published 2026-07-10.
How severe is CVE-2026-56312?: Medium severity. CVSS v3 base score is 6.5 out of 10.