CVE-2026-15611 Unverified email-based SSO account linking
Attackers can hijack victim accounts by linking unverified SSO identities using the victim's email address.
- 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-2026-15611?
CVE-2026-15611 is a critical authentication bypass vulnerability in Logto, published on 23 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Logto allows unverified email-based SSO account linking, enabling an attacker to register an identity at a permissive IdP using a victim’s email and gain unauthorized access to the victim’s account.
Weakness: CWE-287
Which versions are affected by CVE-2026-15611?
How do I fix CVE-2026-15611?
No fix has been published for CVE-2026-15611 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-2026-15611 being exploited?
There is no known exploitation of CVE-2026-15611 in the wild and no public exploit code.
Sources
Also known as GHSA-26cp-25m8-5fgc.