CVE-2026-128042
Received Received - Intake

Race Condition in OpenMage Magento-LTS Shopping Cart Price Rule Usage Limits

Publication date: 2026-11-13

Last updated on: 2026-11-13

Assigner: VulnCheck

Description
OpenMage magento-lts before 20.19.0 and 21.0.0-beta1 before 21.0.0-beta3 contains a race condition in shopping cart price rule usage limits, because Mage_SalesRule_Model_Validator checks coupon limits without locking and the usage counters are later incremented non-atomically. Unauthenticated attackers, including guest shoppers, can submit concurrent checkouts to redeem a limited coupon more times than its cap allows.

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Meta Information

Published
2026-11-13
Last Modified
2026-11-13
Generated
2026-11-13
AI Q&A
2026-11-13
EPSS Evaluated
N/A
NVD
CVE-2026-128042
EUVD
EUVD-2026-125066

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
openmage magento_lts to 20.19.0 (exc)
openmage magento_lts to 21.0.0-beta1 (exc)
openmage magento_lts From 21.0.0-beta3 (exc)
openmage magento_lts to 21.0.0-beta3 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-362 The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

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Executive Summary

This vulnerability is a race condition in OpenMage magento-lts versions before 20.19.0 and 21.0.0-beta1 before 21.0.0-beta3. It occurs in the shopping cart price rule usage limits where the system checks coupon limits without proper locking. Attackers can exploit this by submitting concurrent checkouts to redeem a limited coupon more times than allowed.

Impact Analysis

Unauthenticated attackers, including guest shoppers, can exploit this to redeem limited coupons beyond their allowed usage. This may lead to financial losses for the business due to excessive coupon redemptions and potential abuse of promotional offers.

Mitigation Strategies

Upgrade OpenMage magento-lts to version 20.19.0 or later, or 21.0.0-beta3 or later to address the race condition in shopping cart price rule usage limits.

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