How severe is CVE-2026-25524?

CVE-2026-25524 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-25524 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25524?

CVE-2026-25524 affects Openmage Magento. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25524?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-25524 have an EU (EUVD) identifier?

Yes. CVE-2026-25524 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23889.

When was CVE-2026-25524 published?

CVE-2026-25524 was published on 2026-04-20 and last updated on 2026-06-17.

CVE-2026-25524

CVE-2026-25524 is a high-severity vulnerability in Openmage Magento with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23889
Weakness: CWE-502
Affected product: Openmage Magento
Published: 2026-04-20
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-25524?: CVE-2026-25524 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-25524 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25524?: CVE-2026-25524 affects Openmage Magento. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25524?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-25524 have an EU (EUVD) identifier?: Yes. CVE-2026-25524 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23889.
When was CVE-2026-25524 published?: CVE-2026-25524 was published on 2026-04-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openmage:magento:*:*:*:*:lts:*:*:*

More vulnerabilities in Openmage Magento

CVE-2021-21426 — Critical (CVSS 9.8): Magento-lts is a long-term support alternative to Magento Community Edition (CE). In magento-lts versions 19.4.12 and…
CVE-2021-21427 — Critical (CVSS 9.1): Magento-lts is a long-term support alternative to Magento Community Edition (CE). A vulnerability in magento-lts…
CVE-2026-40488 — High (CVSS 8.8): Magento Long Term Support (LTS) is an unofficial, community-driven project provides an alternative to the Magento…
CVE-2021-41144 — High (CVSS 8.8): OpenMage LTS is an e-commerce platform. Prior to versions 19.4.22 and 20.0.19, a layout block was able to bypass the…
CVE-2020-15244 — High (CVSS 8.0): In Magento (rubygems openmage/magento-lts package) before versions 19.4.8 and 20.0.4, an admin user can generate soap…
CVE-2023-41879 — High (CVSS 7.5): Magento LTS is the official OpenMage LTS codebase. Guest orders may be viewed without authentication using a…

All CVEs affecting Openmage Magento →

Other CWE-502 (Deserialization of Untrusted Data) vulnerabilities

CVE-2026-41104 — Critical (CVSS 10.0): Deserialization of untrusted data in Microsoft Planetary Computer Pro allows an unauthorized attacker to disclose…
CVE-2026-43633 — Critical (CVSS 10.0): HestiaCP versions 1.9.0 through 1.9.4 contain a deserialization vulnerability in the web terminal component caused by a…
CVE-2026-33819 — Critical (CVSS 10.0): Deserialization of untrusted data in Microsoft Bing allows an unauthorized attacker to execute code over a network.
CVE-2026-20131 — Critical (CVSS 10.0): A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) Software could…
CVE-2026-25632 — Critical (CVSS 10.0): EPyT-Flow is a Python package designed for the easy generation of hydraulic and water quality scenario data of water…
CVE-2025-14931 — Critical (CVSS 10.0): Hugging Face smolagents Remote Python Executor Deserialization of Untrusted Data Remote Code Execution Vulnerability.…

Browse all CWE-502 (Deserialization of Untrusted Data) vulnerabilities →