CVE-2026-72588: bluewave-labs Checkmate · Observable Response Discrepancy
Affects bluewave-labs CheckmateSource CVE Database V5
Not known to be exploited · CVSS 5.3 Medium.
Data as of 7 Nov 2026, 23:24 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 36% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 10 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| bluewave-labsCheckmate | Affected
| Fixed in– |
AI-suggested
Until a fix is available, consider implementing uniform responses for password recovery requests regardless of email registration status to prevent user enumeration.
Description
CVE-2026-72588 is a user enumeration vulnerability in bluewave-labs Checkmate up to version 2.1.0. It allows unauthenticated remote attackers to determine if an email address is registered by observing different HTTP response codes from the password recovery endpoint. This discrepancy enables attackers to enumerate valid user accounts. The vulnerability has a medium severity with a CVSS score of 5.3.