CVE-2026-128046: OpenMage magento-lts · Incomplete List of Disallowed Inputs
Affects OpenMage magento-ltsSource CVE Database V5
Not known to be exploited · CVSS 9.2 Critical : upgrade to 20.18.2 as a priority.
Data as of 13 Nov 2026, 09:57 UTC
Thin evidence
One scorer or none| CNA (VulnCheck) | CVSS 4.0 | 9.2 |
|---|---|---|
| CNA (VulnCheck) | CVSS 3.1 | 8.1 |
- Patch
- Available – fixed in 20.18.2, 21.0.0-beta3
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 13 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
Upgrade magento-lts to 20.18.2; magento-lts to 21.0.0-beta3; openmage/magento-lts to 21.0.0-beta3 or 20.18.2.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| OpenMagemagento-lts | Affected
| Fixed in
|
| OpenMagemagento-lts | Affected
| Fixed in
|
GitHubopenmage/magento-ltspkg:github/openmage/magento-ltsOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available in OpenMage magento-lts versions 20.18.2 and 21.0.0-beta3. Users should upgrade to these versions or later to remediate this vulnerability. No other vendor advisory mitigation instructions are provided, so upgrading is the recommended action.
Description
OpenMage magento-lts versions 20.17.0 before 20.18.2 and 21.0.0-beta1 before 21.0.0-beta3 have an unrestricted file upload vulnerability. The vulnerability arises because the blocklist for disallowed file extensions in the general/file/protected_extensions setting omits certain dangerous extensions such as phar, php8, and phps. This omission allows unauthenticated attackers to upload .phar files via product File custom options to a predictable path and execute code on servers that treat .phar files as PHP scripts.
References
- github.com/OpenMage/magento-lts/security/advisories/GHSA-4fxg-469f-r6fc (opens in a new tab)
- github.com/OpenMage/magento-lts/commit/ba76b2346fe1e380f39c23e68ccb818d7324d24f (opens in a new tab)
- github.com/OpenMage/magento-lts/commit/5b6f985785245a964aa3dc78609f6af44d9d5e27 (opens in a new tab)
- github.com/OpenMage/magento-lts/commit/dd692b825ba50f196bcc20ae67fbed48dd95da56 (opens in a new tab)
- vulncheck.com/advisories/openmage-magento-lts-20.17.0-before-20.18.2-unrestricted-file-upload-rce-via-custom-options (opens in a new tab)