CVE-2026-41129 Craft CMS has Server-Side Request Forgery (SSRF) with Asset Uploads Mutations
Craft CMS allows Server-Side Request Forgery via asset upload mutations if specific GraphQL permissions are enabled, requiring a patch.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-41129?
CVE-2026-41129 is a medium-severity server-side request forgery vulnerability in craftcms cms, published on 21 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Craft CMS is a content management system (CMS). Versions on the 4.x branch through 4.17.8 and the 5.x branch through 5.9.14 are vulnerable to Server-Side Request Forgery. The exploitation requires a few permissions to be enabled in the used GraphQL schema: "Edit assets in the <VolumeName> volume" and "Create assets in the <VolumeName> volume." Versions 4.17.9 and 5.9.15 patch the issue.
Weakness: CWE-918
Which versions are affected by CVE-2026-41129?
4 open source packages ship an affected version, including craftcms/cms.
| Package | Affected | Fixed in |
|---|---|---|
craftcms/cms Packagist | From 4.0.0-RC1 | 4.17.9 |
craftcms/cms Packagist | From 4.0.0-RC1 | 4.17.9 |
craftcms/cms Packagist | From 5.0.0-RC1 | 5.9.15 |
craftcms/cms Packagist | From 5.0.0-RC1 | 5.9.15 |
How do I fix CVE-2026-41129?
Upgrade craftcms/cms to a fixed version for your release line: 4.17.9 or 5.9.15.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-41129 being exploited?
There is no known exploitation of CVE-2026-41129 in the wild and no public exploit code.
Sources
Also known as CLSA-2026-1783386121, GHSA-3m9m-24vh-39wx.