CVE-2026-71537

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Source
https://cve.org/CVERecord?id=CVE-2026-71537
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71537.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-71537
Aliases
Published
2026-09-18T17:43:02Z
Modified
2026-09-19T03:47:22Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
Paymenter: Credit-refund double-spend race condition in service downgrade (doUpgrade)
Details

Paymenter is a free and open-source webshop solution for management of hosting services. Prior to 1.5.7, app/Livewire/Services/Upgrade.php::doUpgrade() relies on Service::upgradable to check for a pending service upgrade and later executes $credit->increment('amount', abs($price)) without DB::transaction or lockForUpdate() spanning those operations. An authenticated customer with an active downgradable service can submit concurrent downgrade requests that each observe no pending upgrade, create separate upgrade records, and increment the same account credit balance, producing multiple spendable refunds for one downgrade. This issue is fixed in version 1.5.7.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-362"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71537.json"
}
References

Affected packages

Git / github.com/paymenter/paymenter

Affected ranges

Type
GIT
Repo
https://github.com/paymenter/paymenter
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
f8a884e670e9b9e5efb59ab5a7c606bf058b17d7
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.5.7"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v1.*
v1.0.0
v1.0.1
v1.0.2
v1.0.3
v1.0.4
v1.1.0
v1.1.1
v1.2.0
v1.2.1
v1.2.10
v1.2.2
v1.2.3
v1.2.4
v1.2.5
v1.2.6
v1.2.7
v1.2.8
v1.2.9
v1.3.0
v1.3.1
v1.3.2
v1.3.4
v1.4.0
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.4.5
v1.4.6
v1.5.0
v1.5.1
v1.5.2
v1.5.3
v1.5.4
v1.5.5
v1.5.6

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71537.json"