Critical severity · published May 11, 2026
CVE-2026-42607
Grav: Remote Code Execution (RCE) via Malicious Plugin ZIP Upload in Direct Install Feature
9.1
CVSS
4.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)4.4% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
grav · getgrav
< 2.0.0-beta.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42607
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42607
github.com
https://github.com/getgrav/grav/commit/5a12f9be8314682c8713e569e330f11805d0a663
github.com
https://github.com/getgrav/grav/security/advisories/GHSA-w48r-jppp-rcfw
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