CVE-2026-25524: Magento Long Term Support (LTS) is an unofficial, community-driven project provides an alternative to the Mage

Q: How do I fix CVE-2026-25524?

magento: upgrade to 20.17.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-25524 being exploited?

CVE-2026-25524 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-25524 affect?

CVE-2026-25524 affects magento. Severity is high (CVSS 8.1). 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 suc

Q: How urgent is CVE-2026-25524?

Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.1REMOTEUPGRADE

CVE-2026-25524 is a high-severity flaw (CVSS 8.1) affecting magento. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-502
Published	2026-04-20
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: openmage

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-20 17:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

openmage magento UPGRADE

Affected: < 20.17.0

Fixed in: 20.17.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy magento || rpm -q magento || magento --version

2. UPGRADE to 20.17.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade magento

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade magento

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-25524?

magento: upgrade to 20.17.0. Exact commands for each OS are on this page.

Is CVE-2026-25524 being exploited?

CVE-2026-25524 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-25524 affect?

CVE-2026-25524 affects magento. Severity is high (CVSS 8.1). 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 suc

How urgent is CVE-2026-25524?

Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities · Magento vulnerabilities

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References

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