CVE-2026-47741Public exploitNetwork attack vector

Discount over-redemption via unsynchronized checkout accounting

Published May 29, 2026 · Updated May 29, 2026

Race condition in Shopper before 2.8.0 allows remote attackers to exceed discount usage limits through concurrent checkouts. CreateOrderFromCartAction::execute creates the Order before conditionally incrementing total_use and ignores a zero-row update after usage_limit is reached. Concurrent requests with an active limited coupon commit extra discounted orders, causing silent merchant revenue loss.

CVSS severity5.9
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Shopper before 2.8.0 allows remote attackers to exceed discount usage limits through concurrent checkouts. CreateOrderFromCartAction::execute creates the Order before conditionally incrementing total_use and ignores a zero-row update after usage_limit is reached. Concurrent requests with an active limited coupon commit extra discounted orders, causing silent merchant revenue loss.

The record

CVE
CVE-2026-47741
Published
May 29, 2026
Updated
May 29, 2026
Vendor
Shopper Labs
Product
Shopper
Classifications
CWE-362
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 29, 2026CVE publishedPublication date reported by the CVE source.
  2. May 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shopper Labs · Shopperversion=< 2.8.0

Published CVSS scores

5.9GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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