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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72588
StatePUBLISHED
AssignerTuranSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-10 11:17:31 UTC
Updated2026-08-10 14:17:30 UTC
DescriptionA 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 And Classification

Primary CVSS: v3.1 5.3 MEDIUM from 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.002510000 probability, percentile 0.165910000 (date 2026-08-11)

Problem Types: CWE-204 | CWE-204 CWE-204: Observable Response Discrepancy

VersionSourceTypeScoreSeverityVector
3.1309f9ea4-e3e9-4c6c-b79d-e8eb01244f2cSecondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNACVSS5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Bluewave-labs Checkmate affected 2.1.0 semver Not specified

References

ReferenceSourceLinkTags
github.com/bluewave-labs/Checkmate 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Kamron Rasuljonov (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-08-10T10:32:53.000ZCVE Reserved
CNA2026-08-10T10:32:53.000ZPublic Disclosure

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