---
id: CVE-2026-63407
title: >-
  Grav API Plugin is a RESTful API for Grav CMS that provides full headless
  access to your site's content
summary: >-
  Grav API Plugin is a RESTful API for Grav CMS that provides full headless
  access to your site's content. Prior to 1.0.0-rc.16, the Grav API plugin
  CorsMiddleware returns Access-Control-Allow-Origin: * and permissive OPTIONS
  responses for…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N'
cwe:
  - CWE-942
published: '2026-08-19'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:13:25.910'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63407'
references:
  - url: >-
      https://github.com/getgrav/grav-plugin-api/commit/56ae2ca3bf36c8299a4b3d376c6a20e8c0ed5ba9
    label: security-advisories@github.com
  - url: 'https://github.com/getgrav/grav-plugin-api/releases/tag/1.0.0-rc.16'
    label: security-advisories@github.com
  - url: 'https://github.com/getgrav/grav/security/advisories/GHSA-93px-98wh-6fj2'
    label: security-advisories@github.com
  - url: 'https://github.com/getgrav/grav/security/advisories/GHSA-93px-98wh-6fj2'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00376
epssPercentile: 0.28729
ingestedAt: '2026-09-09T21:22:45.540Z'
---

## Overview

Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content. Prior to 1.0.0-rc.16, the Grav API plugin CorsMiddleware returns Access-Control-Allow-Origin: * and permissive OPTIONS responses for authenticated /api/v1 endpoints. JavaScript from any origin can submit an attacker-obtained JWT through the Authorization or X-API-Token header, read the authenticated response, and perform write operations with the token owner's privileges, enabling data exfiltration and account modification. This issue is fixed in version 1.0.0-rc.16.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.