CVE-2026-32943: Parse Server has a password reset token single-use bypass via concurrent requests

The password reset mechanism does not enforce single-use guarantees for reset tokens. When a user requests a password reset, the generated token can be consumed by multiple concurrent requests within a short time window. An attacker who has intercepted a password reset token can race the legitimate user’s password reset request, causing both requests to succeed. This may result in the legitimate user believing their password was changed successfully while the attacker’s password takes effect instead.

All Parse Server deployments that use the password reset feature are affected.