CVE-2026-42613 Grav: Privilege Escalation via Missing Server-Side Validation of groups/access
Unauthenticated users can gain admin privileges by injecting group fields during registration if specific fields are allowed in the configuration.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-42613?
CVE-2026-42613 is a critical vulnerability in getgrav grav, published on 11 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Grav is a file-based Web platform. Prior to 2.0.0-beta.2, the Login::register() method in the Login plugin accepts attacker-controlled groups and access fields from the registration POST data without server-side validation. When registration is enabled and groups or access are included in the configured allowed fields list, an unauthenticated user can self-register with admin.super privileges by injecting these fields into the registration request. This vulnerability is fixed in 2.0.0-beta.2.
Which versions are affected by CVE-2026-42613?
2 open source packages ship an affected version, including getgrav/grav.
| Package | Affected | Fixed in |
|---|---|---|
getgrav/grav Packagist | All versions | 2.0.0-beta.2 |
getgrav/grav Packagist | All versions | 2.0.0-beta.2 |
How do I fix CVE-2026-42613?
Upgrade getgrav/grav to 2.0.0-beta.2 or later.
Is CVE-2026-42613 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42613 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-pxm6-mhxr-q4mj.