CVE-2026-15657Network attack vector

Merchant credential disclosure via customer-record response

Published Jul 30, 2026 · Updated Jul 30, 2026

Credential exposure in the foreUP customer REST API allows remote authenticated users to read facility merchant API credentials. Each customer-record response returns the facility's cleartext finix_username, finix_password, and finix_merchant_id fields, even for the caller's own record. A single low-privilege customer account is sufficient, and the exposed live credentials grant access to the facility's Finix payment-processor account.

CVSS severity6.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Credential exposure in the foreUP customer REST API allows remote authenticated users to read facility merchant API credentials. Each customer-record response returns the facility's cleartext finix_username, finix_password, and finix_merchant_id fields, even for the caller's own record. A single low-privilege customer account is sufficient, and the exposed live credentials grant access to the facility's Finix payment-processor account.

The record

CVE
CVE-2026-15657
Published
Jul 30, 2026
Updated
Jul 30, 2026
Vendor
foreUP
Product
foreUP
Classifications
CWE-522, T1552
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=API

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

foreUP · foreUPversion=API

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-522Insufficiently Protected Credentials
T1552Unsecured Credentials

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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