CVE-2026-56081
CRITICALDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Exploit Intelligence
Moderate risk: more likely to be exploited than 45% of all known CVEs.
References
Related Vulnerabilities
Other CWE-640 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2019-18818 | Critical | 9.8 | 98% | - | - |
| CVE-2023-7028 | Critical | 10.0 | 95% | KEV | Fix |
| CVE-2017-7615 | High | 8.8 | 91% | - | - |
| CVE-2024-2862 | Critical | 9.1 | 51% | - | - |
| CVE-2025-6216 | Critical | 9.8 | 35% | - | Fix |
| CVE-2019-19844 | Critical | 9.8 | 35% | - | Fix |
Common questions
How do I fix CVE-2026-56081?
No published fix for CVE-2026-56081 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-56081 being actively exploited?
Not that we know of. CVE-2026-56081 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.57% is the estimated probability that it will be exploited in the next 30 days. That is higher than 45% of all scored CVEs.
How severe is CVE-2026-56081?
CVE-2026-56081 has a CVSS v3 base score of 9.1, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-22.