# CVE-2026-16037

## Summary

- **CVE ID:** CVE-2026-16037
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
- **CWE:** CWE-208
- **Published:** Sep 8, 2026
- **Last Modified:** Sep 8, 2026

## Description

Observable timing discrepancy vulnerability in PayTR Payment and Electronic Money Institution Inc. PayTR Virtual Pos iFrame API (v9x) WHMCS Module allows Black Box Reverse Engineering.

This issue affects PayTR Virtual Pos iFrame API (v9x) WHMCS Module: from v9.0.0 before v9.0.3.

## Affected Products

- PayTR Payment and Electronic Money Institution Inc. — PayTR Virtual Pos iFrame API (v9x) WHMCS Module (v9.0.0)

## References

- [CNA](https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-1034)

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._