Deserialization in Openmage Magento
CVE-2026-25524
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.
Vulnerability class: Insecure Deserialization
EPSS: 0.005 (43.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Openmage Magento
- Openmage Magento-lts — versions < 20.17.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-25524?
- CVE-2026-25524 is a high-severity vulnerability in Openmage Magento, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2026-04-20.
- How severe is CVE-2026-25524?
- High severity. CVSS v3 base score is 8.1 out of 10.