{"affected":[{"defaultStatus":"unaffected","product":"magento-lts","source":"CNA: VulnCheck","vendor":"OpenMage","versions":[{"lessThan":"20.19.0","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"20.19.0","versionType":"semver"}]},{"defaultStatus":"unaffected","product":"magento-lts","source":"CNA: VulnCheck","vendor":"OpenMage","versions":[{"lessThan":"21.0.0-beta3","status":"affected","version":"21.0.0-beta1","versionType":"semver"},{"status":"unaffected","version":"21.0.0-beta3","versionType":"semver"}]}],"cveId":"CVE-2026-128042","cwes":["CWE-362"],"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":6.3,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":3.7,"severity":"low","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},{"score":6.3,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":3.7,"severity":"low","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"}],"modifiedAt":1794565089843,"publishedAt":1794562436952,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/OpenMage/magento-lts/security/advisories/GHSA-5rg7-22cv-c9q6"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/OpenMage/magento-lts/commit/2626f027a752cda004c5cf7f8f9bd3cf52f525f2"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/openmage-magento-lts-before-20.19.0-race-condition-in-coupon-usage-limits"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/OpenMage/magento-lts/commit/2626f027a752cda004c5cf7f8f9bd3cf52f525f2"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/OpenMage/magento-lts/security/advisories/GHSA-5rg7-22cv-c9q6"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/openmage-magento-lts-before-20.19.0-race-condition-in-coupon-usage-limits"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/OpenMage/magento-lts/commit/2626f027a752cda004c5cf7f8f9bd3cf52f525f2"}],"revision":"a6ee05d8263664afa485c525d2a661da9d31f92eae150c22844a949a6696cf8b","sources":[{"modifiedAt":1794562436952,"name":"CNA: VulnCheck","retrievedAt":1794564837013,"url":"https://www.cve.org/CVERecord?id=CVE-2026-128042"},{"modifiedAt":1794565089843,"name":"NVD","retrievedAt":1794572253832,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-128042"}],"ssvc":null,"status":"published","title":"OpenMage magento-lts before 20.19.0 Race Condition in Coupon Usage Limits","updatedAt":1794572253832}