Vulnerability · Published Aug 10, 2026 · Assigned by TuranSec

CVE-2026-72588bluewave-labs Checkmate - User Enumeration via Differential HTTP Response in Password Recovery

Medium 5.3

In plain English

A medium-severity security flaw in Checkmate from bluewave-labs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.4%top 63.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
bluewave-labs	Checkmate	0 – through 2.1.0

Weakness: CWE-204 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

Product third-party-advisory