Paper/Archive/CVE-2026-56081

CVE-2026-56081

Cap-go capgo — Cap-go - Account Lockout via 2FA Misconfiguration on Unverified Email

Description · from the CVE record

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

ProductAffectedFixed inSource
capgo< 12.128.212.128.2CNA

Scores by source

VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
VulnCheck (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/Cap-go/capgo/security/advisories/GHSA-j4cx-5pw6-5v5jwriteupvulncheck.com/advisories/cap-go-account-lockout-via-2fa-misconfiguration-on-unverified-email