CVE-2026-42609

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/getgrav/grav/commit/5a12f9be8314682c8713e569e330f11805d0a663	Patch
https://github.com/getgrav/grav/commit/c66dfeb5ff679a1667678c6335eb9ff3255dfc47	Patch
https://github.com/getgrav/grav/commit/d904efc33e03ebb597afde8d3368b28cf0423632	Patch
https://github.com/getgrav/grav/security/advisories/GHSA-rr73-568v-28f8	Exploit Patch Vendor Advisory
https://github.com/getgrav/grav/security/advisories/GHSA-rr73-568v-28f8	Exploit Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:getgrav:grav::::::::
	cpe:2.3:a:getgrav:grav:2.0.0:beta1::::::

History

No history.

Information

Published : 2026-05-11 16:17

Updated : 2026-06-17 10:48

NVD link : CVE-2026-42609

Mitre link : CVE-2026-42609

CVE.ORG link : CVE-2026-42609

JSON object : View

Products Affected

getgrav

grav

CWE

CWE-269

Improper Privilege Management

CWE-285

Improper Authorization

CWE-639

Authorization Bypass Through User-Controlled Key

CWE-837

Improper Enforcement of a Single, Unique Action

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