getgrav Grav up to 2.0.8 FlexDirectory dynamicDataField os command injection

Summaryinfo

A vulnerability was found in getgrav Grav up to 2.0.8. It has been rated as critical. This affects the function FlexDirectory::dynamicDataField of the component FlexDirectory. The manipulation leads to os command injection. This vulnerability is documented as CVE-2026-65608. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in getgrav Grav up to 2.0.8. It has been rated as critical. This issue affects the function FlexDirectory::dynamicDataField of the component FlexDirectory. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Grav versions >= 1.7.0 and before 2.0.9 contain a remote code execution vulnerability. FlexDirectory::dynamicDataField() resolves blueprint data-*@: directives by calling call_user_func_array() on attacker-influenced input, validating only that the target is callable (is_callable()) without restricting dangerous functions such as exec, system, passthru, or shell_exec. Because FlexDirectory registers this handler for every Flex directory, it bypasses the validation added to Blueprint::dynamicData() in 2.0.7 (GHSA-fj2p-qj2f-74v5). Any authenticated user with create or update permission on any Flex-based directory (Flex Users, Flex Pages, Flex Objects, or custom Flex types) can execute arbitrary shell commands on the server.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-65608 since 07/22/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

Upgrading to version 2.0.9 eliminates this vulnerability.

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Productinfo

Vendor

• getgrav

Name

• Grav

Version

• 2.0.0
• 2.0.1
• 2.0.2
• 2.0.3
• 2.0.4
• 2.0.5
• 2.0.6
• 2.0.7
• 2.0.8

Website

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

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