CVE-2026-56708

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 v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

No configuration.

History

12 Oct 2026, 15:10

Type	Values Removed	Values Added
Summary		(es) El plugin Grav API anterior a la versión 1.0.16 contiene una vulnerabilidad de falsificación de petición del lado del servidor en la entrega de webhooks que permite a los atacantes eludir la validación de nombres de host mediante DNS rebinding. Los atacantes que controlan el DNS autoritativo para un nombre de host de webhook configurado pueden responder a las búsquedas de validación con direcciones públicas y a las búsquedas de entrega con direcciones privadas para alcanzar recursos de red internos.

Information

Published : 2026-08-25 02:16

Updated : 2026-10-12 15:10

NVD link : CVE-2026-56708

Mitre link : CVE-2026-56708

CVE.ORG link : CVE-2026-56708

JSON object : View

Products Affected

No product.

CWE

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

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