CVE-2026-56708

EUVD-2026-65206
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.
TOCTOU
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 6.9%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
getgravgrav
𝑥
< 1.0.16
CNA
Common Weakness Enumeration
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