CVE-2026-32700 Devise has a confirmable "change email" race condition that permits user to confirm email they have no access to

Devise is an authentication solution for Rails based on Warden. Prior to version 5.0.3, a race condition in Devise's Confirmable module allows an attacker to confirm an email address they do not own. This affects any Devise application using the reconfirmable option the default when using...

CVE-2026-32700

Devise (Rails) prior to v5.0.3 has a race condition in the Confirmable module used with reconfirmable, allowing an attacker to confirm a victim’s email by issuing two concurrent email-change requests. This desynchronizes confirmation_token and unconfirmed_email; the attacker controls the token’s ...