CVE-2026-65608: Grav before 2.0.9 Remote Code Execution via FlexDirectory

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-23 · updated 2026-10-24
Weakness: CWE-470

Description

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.

Affected products

getgrav grav: from 1.7.0 before 2.0.9 — fixed in 2.0.9

How to fix

Upgrade to a fixed version: getgrav grav 2.0.9. Check the vendor advisory for mitigations.

References

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