CVE-2026-47741CWE-362

Shopper: Race condition on Discount.usage_limit allows silent over-redemption

Medium · published May 29, 2026

CVSS v3.1
5.9
EPSS
0%
Percentile
22.7
In the wild
Unconfirmed
What it is

Shopper is a Headless e-commerce Admin Panel. Prior to 2.8.0, CreateOrderFromCartAction::execute previously created the Order row before checking and incrementing the discount's total_use counter. Under concurrent checkout pressure (Black Friday, flash sale, viral coupon), the global usage_limit was silently exceeded: orders were committed with the discount fully applied to price_amount while the counter blocked at usage_limit. The merchant had no signal that an over-redemption had occurred. This vulnerability is fixed in 2.8.0.

The record
Technical detail
CVSS v3.1
5.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00311 · 22.7th percentile
Weakness
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Published
2026-05-29T18:02Z
EPSS history
Timeline
  • 29 MAY 18:02Z
    Shopper: Race condition on Discount.usage_limit allows silent over-redemption
    cvelistv5