Is CVE-2026-39923 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-39923?

CVE-2026-39923 has a CVSS v3 severity of HIGH (8.1).

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CVE-2026-39923

Description

Flarum before 1.8.16 contains a password reset token expiry bypass vulnerability that allows unauthenticated attackers to reuse expired password reset tokens by submitting them directly to the reset processing endpoint. The SavePasswordController::handle() method calls PasswordToken::findOrFail() without performing any expiry validation, allowing attackers to bypass the 24-hour token lifetime enforced only during form rendering and change any account's password to gain an authenticated session.