CVE-2026-128046
OpenMage magento-lts 20.17.0 before 20.18.2 Unrestricted File Upload RCE via Custom Options
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
OpenMage magento-lts 20.17.0 before 20.18.2 and 21.0.0-beta1 before 21.0.0-beta3 contains an unrestricted file upload vulnerability because the general/file/protected_extensions blocklist omits phar, php8, and phps. Unauthenticated attackers can upload a .phar file through a product File custom option to a predictable media/custom_options path and request it directly to execute code on servers that map .phar to PHP and serve that directory.
| CWE | CWE-184 |
| Vendor | openmage |
| Product | magento-lts |
| Published | Nov 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
OpenMage / magento-lts
20.17.0 < 20.18.2
OpenMage / magento-lts
21.0.0-beta1 < 21.0.0-beta3
References
github.com: https://github.com/OpenMage/magento-lts/security/advisories/GHSA-4fxg-469f-r6fc github.com: https://github.com/OpenMage/magento-lts/commit/ba76b2346fe1e380f39c23e68ccb818d7324d24f github.com: https://github.com/OpenMage/magento-lts/commit/5b6f985785245a964aa3dc78609f6af44d9d5e27 github.com: https://github.com/OpenMage/magento-lts/commit/dd692b825ba50f196bcc20ae67fbed48dd95da56 vulncheck.com: https://www.vulncheck.com/advisories/openmage-magento-lts-20.17.0-before-20.18.2-unrestricted-file-upload-rce-via-custom-options
Credits
🔍 arpitjain099 4n86rakam1 colinmollenhour Hanmac