CVE-2026-53981 Cap-go < v12.128.2 Account Takeover via Unauthenticated Email Change Mechanism
Attackers with temporary session access can change registered emails without re-authentication, enabling permanent account takeover via password reset.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-53981?
CVE-2026-53981 is a high-severity authentication bypass vulnerability in Cap-go, published on 12 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Cap-go prior to 12.128.2 contains an account takeover vulnerability in its email change mechanism that allows an attacker with temporary authenticated session access to change the registered email address without re-authentication such as password or MFA verification. Attackers can redirect verification to an attacker-controlled email address and subsequently perform a password reset to permanently take over the victim's account.
Weakness: CWE-306
Which versions are affected by CVE-2026-53981?
How do I fix CVE-2026-53981?
No fix has been published for CVE-2026-53981 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-2026-53981 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53981 exists.
Sources
Also known as GHSA-w56g-jv78-hf79.