Vulnerability · Published Jun 19, 2026 · Assigned by VulnCheck
CVE-2026-56081Cap-go - Account Lockout via 2FA Misconfiguration on Unverified Email
Critical 9.1
In plain English
A critical-severity security flaw in capgo from Cap-go. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Official description
Cap-go before 12.128.2 contains an authentication logic flaw that lets an attacker register and control an account bound to a victim's email address before that email is verified. By enabling two-factor authentication on the pre-registered account, the attacker gains control over the account claimed under the victim's identity, allowing them to read and modify its state and enforce organization-level policies, while the legitimate user is denied access to the account tied to their own email.
Affected products (as reported)
Weakness: CWE-640 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
References
- GHSA Advisory GHSA-j4cx-5pw6-5v5j vendor-advisory
- VulnCheck Advisory: Cap-go - Account Lockout via 2FA Misconfiguration on Unverified Email third-party-advisory