CVE-2026-128049: OpenMage Magento LTS before 20.18.2 CSRF via OAuth Authorization Confirm

Critical 9.4 EPSS 0.2% Magento / Adobe Commerce

OpenMage Magento LTS before 20.18.2 and 21.0.0-beta1 before 21.0.0-beta3 contains a cross-site request forgery vulnerability in the admin and storefront OAuth confirm and confirmSimple actions, which accept GET requests without form-key validation. Attackers holding OAuth consumer credentials can lure a logged-in administrator or customer to a crafted confirm URL that authorizes the attacker's request token, then exchange it at /oauth/token for a persistent REST API access token bound to the victim.

What do these terms mean? CVE · CVSS score · exploited (KEV) · EPSS · backported fix · all terms

What to do now

  1. Check whether you run Magento / Adobe Commerce and which version (commands below).
  2. Install the fixed version for your system: see “Patch it” below.
  3. bin/magento setup:upgrade && bin/magento cache:flush; reload PHP-FPM

Affected and fixed versions

Affected:

Patch it

Use the commands for your system. Distribution packages often keep an older version number with the fix backported, so compare with the fixed package versions in the table below, not only with the upstream version.

Debian
not packaged: composer require magento/product-community-edition
Ubuntu
not packaged: composer
RHEL, AlmaLinux, Rocky, Oracle
not packaged: composer
Fedora
not packaged
SUSE / openSUSE
not packaged
Amazon Linux
not packaged: composer
Arch Linux
not packaged
Alpine
not packaged
FreeBSD
not packaged

General update steps for every system are on the Linux and Unix & BSD pages; after updating, see which services to restart.

Sources

Page generated automatically from official sources on 2026-11-13 23:20 UTC. Always confirm with your vendor's advisory.