PT-2026-51039 · Cap Go · Cap-Go

Published 2026-06-19 · Updated 2026-06-19 · CVE-2026-56081

Mitre

CVSS v3.1

9.1

Critical

Base vector

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

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.

Fix

Weakness Enumeration

CWE-640

Related Identifiers

CVE-2026-56081

Affected Products

Cap-Go

References · 3

• https://github.com/Cap-go/capgo/security/advisories/GHSA-j4cx-5pw6-5v5j · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-56081 · Security Note
• https://vulncheck.com/advisories/cap-go-account-lockout-via-2fa-misconfiguration-on-unverified-email · Note