CVE-2026-56708: Getgrav Grav

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Grav API plugin before 1.0.16 contains a server-side request forgery vulnerability in webhook delivery that allows attackers to bypass hostname validation by DNS rebinding. Attackers controlling authoritative DNS for a configured webhook hostname can answer validation lookups with public addresses and delivery lookups with private addresses to reach internal network resources.

Affected products

• Getgrav Grav: before 1.0.16 (fixed in 1.0.16)

Published 2026-08-25. Last modified 2026-08-31.