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CVE-2026-85531— Payment Validation Bypass in Sipay Electronic Money's OpenCart 3.x

Quick assessment

Affected
Sipay Electronic Money and Payment Services Inc. OpenCart Virtual POS Module
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Sipay Electronic Money and Payment Services Inc. 的 OpenCart Virtual POS 模块存在加密签名验证不当的漏洞，该漏洞允许通过签名验证不严格实现签名伪造。 此问题影响 OpenCart Virtual POS 模块的以下版本：26.8.2 之前至 26.9.1 之前（即 26.8.2 至 26.9.0 版本）。

CVSS 9.8 · Critical

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Sipay Electronic Money and Payment Services Inc. OpenCart Virtual POS Module 26.8.2< 26.9.1 affected
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I. Basic Information for CVE-2026-85531

Vulnerability Information
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Vulnerability Title
Payment Validation Bypass in Sipay Electronic Money's OpenCart 3.x
Source: CVE Program / CVE List V5
Vulnerability Description
Improper verification of cryptographic signature vulnerability in Sipay Electronic Money and Payment Services Inc. OpenCart Virtual POS Module allows Signature Spoofing by Improper Validation. This issue affects OpenCart Virtual POS Module: from 26.8.2 before 26.9.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Sipay Electronic Money and Payment Services Inc. OpenCart Virtual POS Module 26.8.2 ~ 26.9.1 -

II. Public POCs for CVE-2026-85531

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III. Intelligence Information for CVE-2026-85531

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Vendor Advisories for CVE-2026-85531 (1)

IV. Related Vulnerabilities

Same vendor: Sipay Electronic Money and Payment Services Inc.
Same weakness: CWE-347

V. Comments for CVE-2026-85531

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