---
id: "CVE-2026-128049"
page: "https://infrastack.ai/live/CVE-2026-128049"
kind: "vulnerability"
aliases: ["CVE-2026-128049"]
title: "OpenMage Magento: forged GET request links attacker OAuth token to admin"
severity: "critical"
cvss: 9.4
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["magento", "oauth", "openmage", "package", "self-hosted"]
not_affected_if: ["fixed-version", "oauth-unused"]
published_at: "2026-11-13T10:18:10+00:00"
first_seen_at: "2026-11-13T10:47:32+00:00"
updated_at: "2026-11-13T10:48:15+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-128049", "first_seen_at": "2026-11-13T10:47:32+00:00"}]
exploit_sources: []
---

# OpenMage Magento: forged GET request links attacker OAuth token to admin

Link for people: https://infrastack.ai/live/CVE-2026-128049 (this .md is for agents)

OpenMage Magento's admin and storefront OAuth confirm actions accept GET requests without form-key validation, so a crafted link can authorize an attacker's OAuth request token. The attacker then exchanges it for a persistent REST API token bound to a logged-in administrator or customer.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed OpenMage Magento version against the fixed ranges below.
- Look for `OAuth` confirm routes (`confirm` and `confirmSimple`) in the admin and storefront that accept GET requests.

## Fix

- OpenMage Magento LTS: upgrade to `20.18.2` or later.
- OpenMage Magento 21.0.0-beta line: upgrade to `21.0.0-beta3` or later.

## Timeline

- 2026-11-13T10:47:32+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-128049

## Documents

- [advisory] Vendor advisory: github.com https://github.com/OpenMage/magento-lts/security/advisories/GHSA-grrq-9gq2-vm55
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/openmage-magento-lts-before-20.18.2-csrf-via-oauth-authorization-confirm
- [fix] Patch: github.com https://github.com/OpenMage/magento-lts/commit/1f83e49b60e08aa7ba89dcc2d41ea21f62c0b796

## From the sources

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.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_