CVE-2026-25524
OpenMage LTS's Phar Deserialization leads to Remote Code Execution
Magento Long Term Support (LTS) is an unofficial, community-driven project provides an alternative to the Magento Community Edition e-commerce platform with a high level of backward compatibility. Prior to version 20.17.0, PHP functions such as `getimagesize()`, `file_exists()`, and `is_readable()` can trigger deserialization when processing `phar://` stream wrapper paths. OpenMage LTS uses these functions with potentially controllable file paths during image validation and media handling. An attacker who can upload a malicious phar file (disguised as an image) and trigger one of these functions with a `phar://` path can achieve arbitrary code execution. Version 20.17.0 patches the issue.
- Affected
- OpenMage · magento-lts
- CVSS v3.1 GITHUB
- 8.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.71% chance of exploitation in the next 30 days, 53rd percentile
- Published
- 2026-04-20
Proof-of-concept exploits (1)
Security advisories
- OpenMage/magento-lts/security/advisories/GHSA-fg79-cr9c-7369
- OpenMage/magento-lts/releases/tag/v20.17.0