CVE-2026-42609 Details
Description
Grav is a file-based Web platform. Prior to 2.0.0-beta.2, a business logic vulnerability in the Grav Admin Panel allows a low-privileged user (with only user creation permissions) to overwrite existing accounts, including the primary administrator. By creating a new user with a username that already exists, the system updates the existing account's metadata and permissions instead of rejecting the request. This leads to a Denial of Service (DoS) on administrative functions and Privilege De-escalation of the root account. This vulnerability is fixed in 2.0.0-beta.2.
A business logic vulnerability exists in the Grav Admin Panel versions prior to 2.0.0-beta.2. It allows a low-privileged user with user creation permissions to overwrite existing accounts, including the primary administrator. This is achieved by creating a new user with a username that already exists, which triggers an update of the existing account's metadata and permissions. As a result, the original admin rights are stripped away, leading to a denial-of-service on administrative functions and a privilege downgrade of the root account.
This vulnerability has been fixed in Grav version 2.0.0-beta.2.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 14, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-269 | Improper Privilege Management | [email protected] |
| CWE-285 | Improper Authorization | [email protected] |
| CWE-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
| CWE-837 | Improper Enforcement of a Single, Unique Action | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| getgrav grav | <= 1.8.0 2.0.0 beta1 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 14, 2026 | CVE Modified | CISA-ADP |
| May 12, 2026 | Initial Analysis | [email protected] |
| May 11, 2026 | New CVE Received | [email protected] |