CVE-2026-128049 json
OpenMage Magento LTS before 20.18.2 CSRF via OAuth Authorization Confirm
published 19d ago modified yesterday also EUVD-2026-125059 , GHSA-grrq-9gq2-vm55
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository OpenMage/magento-lts. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 9.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 5%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Is CVE-2026-128049 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-14).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.4 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H |
| CNA | 3.1 | 9.0 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H |
| CNA | 4.0 | 9.4 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 9.0 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H |
Affected products
- OpenMage magento-lts
Classification
- Weakness
-
- CWE-352 Cross-Site Request Forgery
References
-
github.com
/OpenMage/magento-lts/commit/1f83e49b60e08aa7ba89dcc2d41ea21f62c0b796
patch
-
github.com
/OpenMage/magento-lts/security/advisories/GHSA-grrq-9gq2-vm55
vendor-advisory, advisory
-
vulncheck.com
/advisories/openmage-magento-lts-before-20.18.2-csrf-via-oauth-authorization-confirm
third-party-advisory
Sources
- CVE List CVE-2026-128049
- NVD CVE-2026-128049
- Maintainer advisory GHSA-grrq-9gq2-vm55
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of OpenMage/magento-lts published their own advisory on GitHub. Reviewed sources take precedence over it.