ZeroDay Findings
Sign inSign up

Findings

CVE-2026-32700

Devise is an authentication solution for Rails based on Warden.

Published Mar 18, 2026 · updated Jun 17, 2026 · heartcombo devise

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 option (the default when using Confirmable with email changes). By sending two concurrent email change requests, an attacker can desynchronize the and fields. The confirmation token is sent to an email the attacker controls, but the in the database points to a victim's email address. When the attacker uses the token, the victim's email is confirmed on the attacker's account. This is patched in Devise v5.0.3. Users should upgrade as soon as possible. As a workaround, applications can override a specific method from Devise models to force to be persisted when unchanged. Note that Mongoid does not seem to respect that should force the attribute to be persisted, even if it did not really change, so the user might have to implement a workaround similar to Devise by setting as well.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 18, 2026 · NIST NVD

    Detected

    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 option (the default when using Confirmable with email changes). By sending two concurrent email change requests, an attacker can desynchronize the and fie

  2. Jun 17, 2026 · NIST NVD

    Updated

    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 option (the default when using Confirmable with email changes). By sending two concurrent email change requests, an attacker can desynchronize the and fie

Affected

  • cpe heartcombo/deviseversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-32700

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-32700

    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 option (the defaul

    nvd.nist.gov

References