CVE Watch16 sept 2026

CVE-2026-56831

Shopper is a Headless e-commerce Admin Panel. Prior to 2.9.0, the /cpanel/discounts administrative interface accepts negative fixed_amount d

CVSS

6.5

Medio

EPSS

0.4%

p35

KEV

—

Exploit Today

0-100

Publicado: 15 sept 2026 · Última mod.: 16 sept 2026 · CWE-20

EPSS · 30d

0.4%EPSS · 30 días0.4%

2026-09-162026-09-23

Descripción técnica

Shopper is a Headless e-commerce Admin Panel. Prior to 2.9.0, the /cpanel/discounts administrative interface accepts negative fixed_amount discount values, persists them in sh_discounts, and passes them through vendor/shopper/cart/src/Discounts/DiscountCalculator.php and vendor/shopper/cart/src/Pipelines/Calculate.php without enforcing a positive-value invariant. Because the calculation subtracts discountTotal from the subtotal, a negative discount increases the resulting order total instead of reducing it. Malformed discount records can therefore cause incorrect pricing and financial data integrity failures, although the advisory does not establish a customer-facing exploitation path. This issue is fixed in version 2.9.0.

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