Grav: Remote code execution via unrestricted callable in Blueprint::dynamicData() — GHSA-FJ2P-QJ2F-74V5

Summary

### Summary An account with the `admin.pages` permission (or `api.pages.write`) can run shell commands on the server. The command executes whenever anyone — including an unauthenticated visitor — opens the page. ### Details `Blueprint::dynamicData()` (system/src/Grav/Common/Data/Blueprint.php:426) passes a `Class::method` string and its arguments straight to `call_user_func_array()` with no allowlist. The form…

Timeline

Published by source

2026-09-02

Risk context

• Reported severity or threat level: high.
• Reported CVSS score: 8.7 out of 10.
• Reported EPSS value: 0.00343.
• Review exposure for the affected product or family: composer: getgrav/grav.

Product

composer: getgrav/grav

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-FJ2P-QJ2F-74V5

Source

GitHub

Vendor

GitHub

Published by source

2026-09-02

Last source activity

2026-09-02

Additional identifiers

CVE-2026-64850

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.