getgrav up to 2.0.0-beta.1 Registration Login::register input validation

Summaryinfo

A vulnerability, which was classified as critical, has been found in getgrav grav up to 2.0.0-beta.1. The affected element is the function Login::register of the component Registration Handler. Performing a manipulation results in input validation. This vulnerability was named CVE-2026-42613. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in getgrav grav up to 2.0.0-beta.1. It has been classified as critical. This affects the function Login::register of the component Registration Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Grav is a file-based Web platform. Prior to 2.0.0-beta.2, the Login::register() method in the Login plugin accepts attacker-controlled groups and access fields from the registration POST data without server-side validation. When registration is enabled and groups or access are included in the configured allowed fields list, an unauthenticated user can self-register with admin.super privileges by injecting these fields into the registration request. This vulnerability is fixed in 2.0.0-beta.2.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-42613 since 04/29/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 2.0.0-beta.2 eliminates this vulnerability.

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Productinfo

Vendor

• getgrav

Name

• grav

Version

• 2.0.0-beta.0
• 2.0.0-beta.1

Website

• Product: https://github.com/getgrav/grav/

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CPE 2.2info

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