---
cve: "CVE-2026-63407"
severity: "HIGH"
cvss: 8.2
epss: "0.3%"
vendor: "getgrav"
kev: false
exploited: false
published: "2026-08-19 16:18:37"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T16:06:08+02:00"
---

# CVE-2026-63407

> 8.2 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 56ae2ca3bf36c8299a4b3d376c6a20e8c0ed5ba9 (Commit)
- 66d13046175f4d6d7176db1c28a695cf3bd8d864 (Commit)

## Referenzen

- <https://github.com/getgrav/grav/security/advisories/GHSA-93px-98wh-6fj2>
- <https://github.com/getgrav/grav-plugin-api/commit/56ae2ca3bf36c8299a4b3d376c6a20e8c0ed5ba9>
- <https://github.com/getgrav/grav-plugin-api/releases/tag/1.0.0-rc.16>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-63407) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_