---
cve: "CVE-2026-63408"
severity: "HIGH"
cvss: 7.5
epss: "36%"
vendor: "getgrav"
kev: false
exploited: false
published: "2026-08-19 16:18:38"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T22:58:28+02:00"
---

# CVE-2026-63408

> 7.5 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 JwtAuthenticator::extractBearerToken() accepts a JWT from the token URL query parameter on every /api/v1 route, including state-changing endpoints. Request URLs consequently expose valid access tokens through Apache, proxy, and CDN logs, browser history, and Referer headers, allowing a party with access to those records to reuse the token with the owner's API privileges. This issue is fixed in version 1.0.0-rc.16.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

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

## Referenzen

- <https://github.com/getgrav/grav/security/advisories/GHSA-4hpj-wmpw-ghwq>
- <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-2026-63408) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_