---
title: "CVE-2026-85531: Sipay OpenCart Virtual POS Module - Authentication Bypass"
description: "Sipay OpenCart Virtual POS Module >= 26.8.2 < 26.9.1 contains a signature spoofing vulnerability caused by improper cryptographic signature verification, letting attackers bypass signature validation, exploit requires crafted signature input."
url: https://panop.io/threat-heartbeat/CVE-2026-85531/
---

# CVE-2026-85531 Sipay OpenCart Virtual POS Module - Authentication Bypass

Sipay OpenCart Virtual POS Module >= 26.8.2 < 26.9.1 contains a signature spoofing vulnerability caused by improper cryptographic signature verification, letting attackers bypass signature validation, exploit requires crafted signature input.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.20% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-85531)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

9 October 2026

Updated

15 October 2026

Weakness

[CWE-347](https://cwe.mitre.org/data/definitions/347.html)

## Vendor fix

Upgrade to version 26.9.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-85531](https://nvd.nist.gov/vuln/detail/CVE-2026-85531)
- [https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-1286](https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-1286)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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