What’s Vulnerable › Vulnerabilities

CVE-2026-47741: Shopper: Race condition on Discount.usage_limit allows silent over-redemption

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-29 · updated 2026-07-22
• Weakness: CWE-362

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.

Affected products

• shopperlabs shopper: before 2.8.0

References

• https://github.com/shopperlabs/shopper/issues/510
• https://github.com/shopperlabs/shopper/pull/511
• https://github.com/shopperlabs/shopper/security/advisories/GHSA-9rh9-hf3w-9fgg
• https://github.com/shopperlabs/shopper/issues/510

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