Race Condition Affecting devise package, versions <5.0.3
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RUBY-DEVISE-15678508
- published18 Mar 2026
- disclosed17 Mar 2026
- creditGrant Cox,James Kettle
Introduced: 17 Mar 2026
NewCVE-2026-32700 (opens in a new tab)How to fix?
Upgrade devise to version 5.0.3 or higher.
Overview
devise is a flexible authentication solution for Rails with Warden.
Affected versions of this package are vulnerable to Race Condition in the Confirmable module, when the reconfirmable option is enabled (which it is by default). An attacker can confirm an email address they don't own by sending two concurrent "change email" requests, causing a desynchronization between the confirmation_token and unconfirmed_email fields.
Workaround
This vulnerability can be avoided by overriding the method responsible for postponing email changes in the application's user model to ensure unconfirmed_email is persisted, or by manually setting changed_attributes["unconfirmed_email"] = nil for Mongoid-based applications.