CVE-2026-65608: Grav remote code execution in FlexDirectory dynamic data fields

CVE-2026-65608 · Severity: high · CVSS 8.8 · Published 2026-07-23

Grav, a popular open-source content management system, contains a vulnerability that allows certain users to execute commands on the underlying server. An attacker with basic permissions to create or update content (such as users, pages, or objects) can exploit this flaw to take full control of the web server. This could lead to the theft of sensitive data, website defacement, or a complete service outage.

Technologies: Grav, getgrav/grav (Packagist). Vendors: Grav, Packagist.

Quick answers

Is CVE-2026-65608 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-65608 being exploited in the wild.
How severe is CVE-2026-65608?
High severity, with a CVSS score of 8.8, published 23 July 2026.
Which products and versions are affected?
Grav >= 1.7.0, < 2.0.9; getgrav/grav (Packagist) >= 1.7.0, < 2.0.9, ECOSYSTEM:introduced=1.7.0,fixed=2.0.9.
Is there a fix for CVE-2026-65608?
Yes. getgrav/grav (Packagist): upgrade to 2.0.9 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-65608 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-65608?
Check whether you run Grav or getgrav/grav (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • getgrav/grav (Packagist): upgrade to 2.0.9 or later
    composer require getgrav/grav:^2.0.9

Technical details

A remote code execution (RCE) vulnerability exists in Grav's Flex framework due to an unsafe reflection flaw in FlexDirectory::dynamicDataField(). The component resolves 'data-*@:' directives in blueprints by passing attacker-influenced input to call_user_func_array(). While the system checks if the input is_callable(), it fails to restrict dangerous PHP functions such as exec(), system(), or shell_exec(). This vulnerability represents a bypass of a previous fix (GHSA-fj2p-qj2f-74v5) because the Flex system uses a separate, unprotected handler instead of the patched Blueprint::dynamicData() method. An authenticated attacker with 'create' or 'update' permissions on any Flex-based directory can trigger the vulnerability to achieve arbitrary command execution. The issue is addressed in version 2.0.9.

Affected products

  • getgrav Grav >= 1.7.0, < 2.0.9

Identifiers

  • CVE-2026-65608
  • GHSA-c4wf-2xxc-68qm

Timeline

  • 2026-07-09: advisory: GitHub Security Advisory GHSA-c4wf-2xxc-68qm published
  • 2026-07-23: disclosed: NVD publication of CVE-2026-65608
  • 2026-07-23: patched: Fix released in version 2.0.9

References

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