CVE-2026-75827: Getgrav Grav

High severity, CVSS 8.8. EPSS: 0.9% chance of exploitation in the next 30 days.

Grav before 2.0.15 contains an arbitrary file write vulnerability in the Blueprint dynamic-data bare-function validation that uses an incomplete denylist instead of a positive allowlist. Attackers with page-edit or blueprint-config access can invoke the error_log function through a data directive to append PHP payloads to web-accessible files, achieving remote code execution.

Affected products

• Getgrav Grav: before 2.0.15 (fixed in 2.0.15)

Published 2026-08-18. Last modified 2026-10-08.