CVE-2026-42844: Getgrav Grav

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

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 products

• Getgrav Grav: version 2.0.0 only

Published 2026-05-12. Last modified 2026-06-17.