CVE-2026-56708

Grav API Plugin before 1.0.16 SSRF via DNS Rebinding

MEDIUM
5.3
CVSS Score
Published: August 25, 2026 at 01:30 AM UTC
Updated: October 12, 2026 at 03:10 PM UTC
1 product affected across 1 vendorGrav

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

90%
0 ≤ v < 1.0.160
Vendor states this is fixed in 1.0.16 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-367

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