CVE-2026-56708

MEDIUM 5.3

Grav API Plugin before 1.0.16 SSRF via DNS Rebinding

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-367
Vendor	getgrav
Product	grav
Published	Aug 25, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

getgrav / grav

0 < 1.0.16

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 alham-rizvi