CVE-2026-72588
MediumCVSS 5.3Summary
A user enumeration vulnerability in bluewave-labs/Checkmate through 2.1.0 allows an unauthenticated remote attacker to determine whether a given email address is registered. The POST /api/v1/auth/recovery/request endpoint returns HTTP 200 for registered email addresses and a different status code for unregistered ones, enabling attackers to enumerate valid user accounts.
Risk Assessment
An attacker could collect a list of registered email addresses, which could be used for phishing or brute-force attacks.
Recommendation
Update Checkmate to a version newer than 2.1.0 that fixes user enumeration.
Original NVD description (English source)
A user enumeration vulnerability in bluewave-labs/Checkmate through 2.1.0 allows an unauthenticated remote attacker to determine whether a given email address is registered. The POST /api/v1/auth/recovery/request endpoint returns HTTP 200 for registered email addresses and a different status code for unregistered ones, enabling attackers to enumerate valid user accounts.