# CVE-2026-12258

## Summary

- **CVE ID:** CVE-2026-12258
- **Severity:** CRITICAL
- **CVSS Score:** 9.2 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N)
- **CWE:** CWE-284
- **Published:** Sep 14, 2026
- **Last Modified:** Sep 14, 2026

## Description

Inadequate access control in Hiperdino’s REST v1.0 API. The public endpoint ‘customer/check’ could allow an authenticated attacker to enter a telephone number or an email address. When the value entered belongs to a registered customer, the service returns the associated information (email address and telephone number). No authentication is required beyond a static bearer token, and there is no rate limiting or generic error handling. Successful exploitation of this vulnerability could allow a remote attacker to enumerate a user’s contact details, although this would require obtaining a valid static bearer token, constituting an information disclosure vulnerability.

## Affected Products

- Hiperdino — REST API (1.0)

## References

- [CNA](https://www.incibe.es/en/incibe-cert/notices/aviso/inadequate-access-control-hiperdino-rest-api)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.40%
- **EPSS Percentile:** 33.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._