{"affected":[{"defaultStatus":"unaffected","product":"magento-lts","source":"CNA: VulnCheck","vendor":"OpenMage","versions":[{"lessThan":"20.18.2","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"20.18.2","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-2026-128044","cwes":["CWE-346"],"description":"OpenMage magento-lts before 20.18.2 and 21.x before 21.0.0-beta3 validates OAuth 1.0a oauth_callback URLs with a string-prefix check and falls back to accepting any well-formed URL. Attackers holding a leaked consumer key and secret can supply host-suffix, userinfo, or arbitrary callback URLs to capture an approving administrator's or customer's request token and verifier, then obtain an access token with the victim's API privileges.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":8.7,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N","version":"4.0"},{"score":7.7,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N","version":"3.1"},{"score":8.7,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/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":7.7,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N","version":"3.1"}],"modifiedAt":1794565090123,"publishedAt":1794562435592,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/OpenMage/magento-lts/security/advisories/GHSA-mffc-h5pf-6f42"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/OpenMage/magento-lts/commit/d03a00b60e4a2d4e5a00b44dbc66d25bc3b3fc8f"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/openmage-magento-lts-before-20.18.2-oauth-callback-url-allowlist-bypass"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/OpenMage/magento-lts/commit/d03a00b60e4a2d4e5a00b44dbc66d25bc3b3fc8f"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/OpenMage/magento-lts/security/advisories/GHSA-mffc-h5pf-6f42"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/openmage-magento-lts-before-20.18.2-oauth-callback-url-allowlist-bypass"}],"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/d03a00b60e4a2d4e5a00b44dbc66d25bc3b3fc8f"}],"revision":"65c2d8b2c04357105b9109e93da283e492db85eb46dc40808ea7871cdea65245","sources":[{"modifiedAt":1794562435592,"name":"CNA: VulnCheck","retrievedAt":1794564839341,"url":"https://www.cve.org/CVERecord?id=CVE-2026-128044"},{"modifiedAt":1794565090123,"name":"NVD","retrievedAt":1794572254135,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-128044"}],"ssvc":null,"status":"published","title":"OpenMage magento-lts before 20.18.2 OAuth Callback URL Allowlist Bypass","updatedAt":1794572254135}