Shopper: Race condition on Discount.usage_limit allows silent over-redemption
Published May 29, 2026
5.9
MEDIUMCVSS 3.1
EPSS 0.31%
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
-
- Version < 2.8.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Shopperlabs | Shopper | n/a |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed May 29, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
May–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.31% (0.00311) | 21.67th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.24% (0.00239) | 14.72th | v5 (v2026.06.15) |
| May 30, 2026 | 0.03% (0.00025) | 7.49th | v4 (v2025.03.14) |
References (7)
- https://github.com/advisories/GHSA-9rh9-hf3w-9fgg Advisory
- https://github.com/shopperlabs/shopper/commit/fcd0c5920588702df5b874f432b1042abd77a50b
- https://github.com/shopperlabs/shopper/issues/510 exploitx_refsource_MISC
- https://github.com/shopperlabs/shopper/pull/511 x_refsource_MISC
- https://github.com/shopperlabs/shopper/releases/tag/v2.8.0
- https://github.com/shopperlabs/shopper/security/advisories/GHSA-9rh9-hf3w-9fgg x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-47741
Change history (0)
No recorded changes yet.