CVE-2026-56708

Description

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.

CVSS Vector

References

• https://github.com/getgrav/grav/security/advisories/GHSA-hq2v-cgw4-fw2w
• https://www.vulncheck.com/advisories/grav-api-plugin-before-ssrf-via-dns-rebinding