CVE-2026-56073 Cap-go - OTP Bypass via Response Manipulation in Email Verification
Attackers can bypass email OTP verification by manipulating HTTP responses, enabling unauthorized 2FA enablement and account takeover in Cap-go.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-56073?
CVE-2026-56073 is a critical authentication bypass vulnerability in Cap-go capgo, published on 19 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Cap-go before 12.128.2 contains an authentication bypass vulnerability in OTP verification that allows attackers to bypass email verification by modifying server responses. Attackers can intercept OTP verification requests and manipulate HTTP responses to falsely mark verification successful, enabling unauthorized 2FA enablement and account takeover.
Weakness: CWE-345
Which versions are affected by CVE-2026-56073?
How do I fix CVE-2026-56073?
No fix has been published for CVE-2026-56073 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-56073 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56073 exists.
Sources
Also known as GHSA-g359-4vg7-88hp, GHSA-x2gq-85v8-j9v4.