CVE-2026-116461 in Restro POS
Summary
by MITRE • 10/26/2026
A vulnerability was determined in Omega Solution Restro POS up to 20261026. This impacts an unknown function of the file /sale-invoice/. Executing a manipulation of the argument productUnitSalePrice can lead to business logic errors. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 10/26/2026
The identified vulnerability resides within Omega Solution Restro POS, specifically affecting the /sale-invoice/ endpoint up to version 20261026. This flaw is categorized as a business logic error stemming from improper validation or sanitization of the productUnitSalePrice argument. Unlike traditional memory corruption vulnerabilities that target system stability, this issue exploits the application's internal decision-making processes regarding financial transactions and inventory management. The core technical failure lies in the server-side handling of price inputs during invoice generation, where the software fails to enforce logical constraints on the values submitted by clients. This allows an attacker to manipulate transactional data without necessarily crashing the system or gaining unauthorized access to underlying operating systems or databases directly through code execution.
From a technical perspective, this vulnerability aligns with CWE-840, which describes Incorrect Business Logic Error, and potentially CWE-20, Improper Input Validation if the root cause is insufficient checking of input parameters before processing. The attack vector allows for remote exploitation, meaning that an adversary does not need physical access or local authentication to trigger the flaw. By sending crafted HTTP requests with manipulated productUnitSalePrice values, a malicious actor can alter the final calculated total on sales invoices. This could result in selling items at significantly reduced prices, applying unauthorized discounts, or creating discrepancies between recorded revenue and actual cash flow. The ability to perform this manipulation remotely makes it particularly dangerous for retail environments where point-of-sale systems are often connected to networked payment processors and inventory databases.
The operational impact of this vulnerability is primarily financial and reputational rather than technical in the traditional sense of data exfiltration or system compromise. Successful exploitation can lead to direct monetary loss through undercharging customers, which accumulates rapidly if not detected early. Furthermore, it creates significant accounting discrepancies that complicate audits and inventory reconciliation processes. Since the exploit has been publicly disclosed, automated scanning tools and malicious actors may already be actively probing for this weakness in deployed instances. The lack of response from the vendor to early disclosure attempts exacerbates the risk profile, leaving existing installations exposed without official patches or guidance on remediation. This situation highlights a critical gap in supply chain security where third-party software components are integrated into business operations without adequate support mechanisms during crisis periods.
Mitigation strategies must focus on immediate compensating controls since no vendor patch is available. Organizations should implement strict input validation rules at the application layer to ensure that price values fall within expected ranges and match predefined product catalog data rather than accepting arbitrary user-supplied amounts. Network-level defenses such as Web Application Firewalls can be configured to detect and block anomalous requests targeting the /sale-invoice/ endpoint with suspicious parameter patterns related to pricing logic. Additionally, implementing robust server-side business rule enforcement is crucial; prices should always be derived from trusted database records rather than client inputs during transaction finalization. Regular audits of sales logs against inventory changes can help identify instances where this vulnerability may have been exploited in the past. Until a vendor-provided fix is released, restricting network access to the POS system and limiting user privileges for those interacting with invoice generation modules are essential steps to reduce the attack surface.