High severity · published Jul 30, 2026
CVE-2026-15658
foreUP customer REST API allows unauthenticated endpoint access
8.1
CVSS
0.4%
EPSS
No
On KEV
Description
A vulnerability in the foreUP customer REST API allows any authenticated, low-privilege customer to access an endpoint that
returns the records of other users without checking that the caller owns the data associated with that record.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
foreUP · foreUP
API · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-15658
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-15658
kb.cert.org
https://kb.cert.org/vuls/id/790363
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foreUP customer REST API allows authenticated users to read cleartext payment-processor merchant credentials