Race Condition Affecting ruby-devise package, versions *


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.35% (27th percentile)

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  • Snyk IDSNYK-DEBIAN11-RUBYDEVISE-15745263
  • published22 Mar 2026
  • disclosed18 Mar 2026

Introduced: 18 Mar 2026

CVE-2026-32700  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

There is no fixed version for Debian:11 ruby-devise.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ruby-devise package and not the ruby-devise package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

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 Confirmable with email changes). By sending two concurrent email change requests, an attacker can desynchronize the confirmation_token and unconfirmed_email fields. The confirmation token is sent to an email the attacker controls, but the unconfirmed_email 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 unconfirmed_email to be persisted when unchanged. Note that Mongoid does not seem to respect that will_change! 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 changed_attributes["unconfirmed_email"] = nil as well.

CVSS Base Scores

version 3.1