CVE-2026-85531

Summary

The Sipay OpenCart Virtual POS Module has a critical cryptographic signature verification flaw that allows attackers to spoof digital signatures and gain full control over payment processing operations. This vulnerability enables unauthorized transaction processing and financial data manipulation.

Exploitability

Exploitation is relatively straightforward requiring only network access to the affected module, with no authentication required for signature validation bypass.

Blast radius

The vulnerability could impact all OpenCart installations using the Sipay Virtual POS module between versions 26.8.2 and 26.9.1, potentially allowing attackers to process fraudulent transactions and access sensitive payment data across multiple merchant systems.

Detection

No reliable host or network indicator is derivable from the published description.

Prioritized remediation

Upgrade to version 26.9.1 or later to remediate this cryptographic signature verification vulnerability.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.