CVE-2026-47741

MEDIUM

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

Title source: cna
STIX 2.1

Description

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.

References (3)

Core 3
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/shopperlabs/shopper/issues/510
X_Refsource_Misc x_refsource_misc
https://github.com/shopperlabs/shopper/pull/511

Scores

CVSS v3 5.9
EPSS 0.0024
EPSS Percentile 14.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-362
Status published
Products (2)
shopper/cart 0 - 2.8.0Packagist
shopperlabs/shopper < 2.8.0
Published May 29, 2026
Tracked Since May 30, 2026