CVE-2026-72588

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/bluewave-labs/Checkmate

Configurations

No configuration.

History

23 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) Una vulnerabilidad de enumeración de usuarios en bluewave-labs/Checkmate hasta la versión 2.1.0 permite a un atacante remoto no autenticado determinar si una dirección de correo electrónico dada está registrada. El endpoint POST /api/v1/auth/recovery/request devuelve HTTP 200 para direcciones de correo electrónico registradas y un código de estado diferente para las no registradas, lo que permite a los atacantes enumerar cuentas de usuario válidas.

Information

Published : 2026-08-10 11:17

Updated : 2026-10-24 15:10

NVD link : CVE-2026-72588

Mitre link : CVE-2026-72588

CVE.ORG link : CVE-2026-72588

JSON object : View

Products Affected

No product.

CWE

CWE-204

Observable Response Discrepancy

{"id": "CVE-2026-72588", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72588", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-10T13:22:07.396244Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c", "affectedData": [{"vendor": "bluewave-labs", "product": "Checkmate", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "2.1.0"}], "defaultStatus": "unknown"}]}], "published": "2026-08-10T11:17:31.880", "references": [{"url": "https://github.com/bluewave-labs/Checkmate", "source": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c", "description": [{"lang": "en", "value": "CWE-204"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Una vulnerabilidad de enumeraci\u00f3n de usuarios en bluewave-labs/Checkmate hasta la versi\u00f3n 2.1.0 permite a un atacante remoto no autenticado determinar si una direcci\u00f3n de correo electr\u00f3nico dada est\u00e1 registrada. El endpoint POST /api/v1/auth/recovery/request devuelve HTTP 200 para direcciones de correo electr\u00f3nico registradas y un c\u00f3digo de estado diferente para las no registradas, lo que permite a los atacantes enumerar cuentas de usuario v\u00e1lidas."}], "lastModified": "2026-10-24T15:10:00.190", "sourceIdentifier": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c"}