CVE-2026-15658Network attack vector

Cross-tenant data disclosure via unchecked golfer_id

Published Jul 30, 2026 · Updated Jul 30, 2026

Broken object-level authorization in the foreUP customer REST API allows remote authenticated users to read other customers' records. The endpoint accepts a caller-controlled golfer_id and returns the matching record without verifying that the JWT subject owns it. A low-privilege customer account is sufficient to read cross-tenant profiles, contact details, payment tokens, and billing and transaction history.

CVSS severity8.1
High
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

Broken object-level authorization in the foreUP customer REST API allows remote authenticated users to read other customers' records. The endpoint accepts a caller-controlled golfer_id and returns the matching record without verifying that the JWT subject owns it. A low-privilege customer account is sufficient to read cross-tenant profiles, contact details, payment tokens, and billing and transaction history.

The record

CVE
CVE-2026-15658
Published
Jul 30, 2026
Updated
Jul 30, 2026
Vendor
foreUP
Product
foreUP
Classifications
CWE-639, T1213
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

8.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-639Authorization Bypass Through User-Controlled Key
T1213Data from Information Repositories

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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