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 auth…

Medium CVSS 5.3

CVECVE-2026-56708

First seen2026-08-25 03:16 UTC

Disclosed2026-08-25 02:16 UTC

Last updated2026-08-25 03:16 UTC

Channel statusauto

Summary

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.

In-depth triage

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Sources

NVD DATABASE

Original Links

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

Timeline

2026-08-25 nvd_ingest NVD