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TI-2026-20633 Aliases CVE-2026-25524GHSA-fg79-cr9c-7369

OpenMage LTS's Phar Deserialization leads to Remote Code Execution

Priority HIGH 76CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-502.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00635 50th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed magento-lts (OpenMage): 20.17.0openmage/magento-lts (Packagist): 20.17.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenMagemagento-ltsbefore 20.17.020.17.0Patch availableCNA
—openmage/magento-lts (Packagist)before 20.17.020.17.0Patch availableGHSA-fg79-cr9c-7369
  • magento-lts VendorOpenMage Affected before 20.17.0 Fixed in 20.17.0 Patch available CNA
  • openmage/magento-lts (Packagist) Vendor— Affected before 20.17.0 Fixed in 20.17.0 Patch available GHSA-fg79-cr9c-7369

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openmage:magento:*:*:*:*:lts:*:*:*before 20.17.0VulnerableOpenMage
  • cpe:2.3:a:openmage:magento:*:*:*:*:lts:*:*:* Versions before 20.17.0 Vulnerable ·OpenMage

Remediation

  • Fix · CNA magento-lts (OpenMage) Fixed in 20.17.0
  • Fix · GHSA-fg79-cr9c-7369 openmage/magento-lts (Packagist) Fixed in 20.17.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-25524
  2. 2026-10-03 Alias added: GHSA-fg79-cr9c-7369

References

Exploit 1

Advisory 1

Other 2

  • TI-2026-29239 OpenMage LTS has Customer File Upload Extension Blocklist Bypass that Leads to Remote Code Execution CVSS 4.0HIGH 8.7
  • TI-2023-22272 Magento LTS's guest order "protect code" can be brute-forced too easily CVSS 3.1HIGH 7.5
  • TI-2026-28925 Missing authorization in OpenMage magento-lts CVSS 4.0MEDIUM 5.3
  • TI-2026-20634 OpenMage LTS has Path Traversal Filter Bypass in Dataflow Module CVSS 3.1MEDIUM 4.9
  • TI-2025-39617 OpenMage is vulnerable to XSS in Admin Notifications CVSS 4.0MEDIUM 4.6
  • TI-2021-04494 Magneto-lts vulnerable to Cross-Site Request Forgery CVSS 3.1MEDIUM 4.3
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences