CVE-2026-72588 json
bluewave-labs Checkmate - User Enumeration via Differential HTTP Response in Password Recovery
published 2026-08-10 2 mo ago modified 2026-10-24 16 d ago also EUVD-2026-55218
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 36%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected products
- bluewave-labs Checkmate
Classification
- Weakness
-
- CWE-204 Observable Response Discrepancy
References
-
github.com
/bluewave-labs/Checkmate
third-party-advisory
Sources
- CVE List CVE-2026-72588
- NVD CVE-2026-72588
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