CVE-2026-42607 Grav: Remote Code Execution (RCE) via Malicious Plugin ZIP Upload in Direct Install Feature
An authenticated administrator can achieve remote code execution by uploading a malicious ZIP file via the Direct Install feature, bypassing PHP file restrictions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-42607?
CVE-2026-42607 is a critical vulnerability in getgrav grav, published on 11 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Grav is a file-based Web platform. Prior to 2.0.0-beta.2, an authenticated user with administrative privileges can achieve Remote Code Execution (RCE) by uploading a specially crafted ZIP file through the "Direct Install" tool. While the system attempts to block direct .php file uploads, it fails to inspect the contents of uploaded ZIP archives. Once a malicious plugin is extracted, it can execute arbitrary PHP code or drop a persistent web shell on the server. This vulnerability is fixed in 2.0.0-beta.2.
Weakness: CWE-94
Which versions are affected by CVE-2026-42607?
2 open source packages ship an affected version, including getgrav/grav.
| Package | Affected | Fixed in |
|---|---|---|
getgrav/grav Packagist | All versions | 2.0.0-beta.2 |
getgrav/grav Packagist | All versions | 2.0.0-beta.2 |
How do I fix CVE-2026-42607?
Upgrade getgrav/grav to 2.0.0-beta.2 or later.
Is CVE-2026-42607 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42607 exists.
Public exploit code: 1 Exploit-DB entry.
Sources
Also known as GHSA-w48r-jppp-rcfw.