# CVE-2026-79406: macrozheng mall business logic error in cart quantity update

Source: https://junglewise.ai/threats/cve-2026-79406-macrozheng-mall-business-logic-error-in-cart-quantity-update  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-25. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-79406 · Severity: medium · CVSS 4.3 · Published 2026-08-25

macrozheng mall is an open-source e-commerce platform that manages shopping carts and orders. A flaw in the cart quantity update function allows remote attackers to manipulate item quantities, leading to incorrect orders and financial impact through business logic errors.

Technologies: [Macrozheng Mall](https://junglewise.ai/threats/technologies/mall). Vendors: [Macrozheng](https://junglewise.ai/threats/vendors/macrozheng).

## Quick answers

**Is CVE-2026-79406 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-79406 being exploited in the wild.

**How severe is CVE-2026-79406?** Medium severity, with a CVSS score of 4.3, published 25 August 2026.

**Which products and versions are affected?** Macrozheng Mall up to 1.0.3.

**Is there a fix for CVE-2026-79406?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-79406 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-79406?** Check whether you run Macrozheng Mall at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a business logic error (CWE-840) in the OmsCartItemServiceImpl.updateQuantity method, exposed via the /cart/update/quantity endpoint. An attacker can remotely manipulate the quantity parameter to trigger unintended behavior, such as allowing negative quantities or bypassing validation checks. No authentication is required to exploit this flaw. The attack allows an attacker to disrupt normal cart operations and potentially cause inventory or order inconsistencies. A patch status is not confirmed in available sources.

## Affected products

- macrozheng mall up to 1.0.3

## Timeline

- 2026-08-25: disclosed
- other: Vendor deleted GitHub issue without explanation

## References

- [https://github.com/macrozheng/mall/](https://github.com/macrozheng/mall/)
- [https://github.com/macrozheng/mall/issues/984](https://github.com/macrozheng/mall/issues/984)

## Related threats

- [macrozheng mall business logic error in order generation](https://junglewise.ai/threats/cve-2026-109406-a-weakness-has-been-identified-in-macrozheng-mall-up-to-1-0-3)
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- [macrozheng mall authorization bypass in payment status endpoint](https://junglewise.ai/threats/cve-2026-82423-macrozheng-mall-authorization-bypass-in-payment-status-endpoint)
- [macrozheng mall race condition in order submission](https://junglewise.ai/threats/cve-2026-82364-macrozheng-mall-race-condition-in-order-submission)