CVE-2026-56081
CRITICAL
9.1
CVSS 3.1
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.
Metadata
Severity & Metrics
9.1
CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected products (1)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| Cap-go | capgo | — | 0 < 12.128.2, 12.128.2 |
Weakness (CWE)
| CWE | Source | Description |
|---|---|---|
| CWE-640 | cna | Weak Password Recovery Mechanism for Forgotten Password |
CVSS scores (2)
| Score | Severity | Version | Source | Vector |
|---|---|---|---|---|
| 9.3 | CRITICAL | 4.0 | cna | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N |
| 9.1 | CRITICAL | 3.1 | cna | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
References (2)
- GHSA Advisory GHSA-j4cx-5pw6-5v5j https://github.com/Cap-go/capgo/security/advisories/GHSA-j4cx-5pw6-5v5j
- VulnCheck Advisory: Cap-go - Account Lockout via 2FA Misconfiguration on Unverified Email https://www.vulncheck.com/advisories/cap-go-account-lockout-via-2fa-misconfiguration-on-unverified-email