high8.8
CVE-2026-42844
Low-privileged Grav API users can create super-admin accounts via blueprint-upload
Impact
Grav is a file-based Web platform. In Grav 2.0.0-beta.2, a low-privileged authenticated API user with api.media.write can abuse /api/v1/blueprint-upload to write an arbitrary YAML file into user/accounts/, then log in as the newly created account with api.super privileges. This results in full administrative compromise of the Grav API. This vulnerability is fixed in API 1.0.0-beta.17.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | getgrav/grav | < 2.0.0-beta.4 | 2.0.0-beta.4 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Getgrav | Grav | Version 2.0.0 |