CVE-2026-75836 Grav API Plugin before 1.0.14 Missing Authorization
Authenticated users with basic API access can bypass authorization checks to execute privileged menubar actions in the Grav API plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-75836?
CVE-2026-75836 is a high-severity missing authorization vulnerability in getgrav grav, published on 18 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Grav API plugin (getgrav/grav-plugin-api, bundled with Grav's admin-next/API stack) before 1.0.14 fails to enforce the authorize requirement in MenubarController::executeAction(). While the GET /menubar/items listing endpoint correctly filters menubar items via userPassesAuthorize(), the POST /api/v1/menubar/actions/{plugin}/{action} endpoint only checks the baseline api.access permission and never evaluates the authorize field a plugin registered for that action. Any authenticated caller with api.access can therefore invoke a privileged menubar action directly, bypassing the intended authorization. No plugin bundled with core Grav currently registers a privileged authorize handler, so on a stock install the impact is latent; the flaw affects any first- or third-party plugin relying on the documented authorize semantics.
Weakness: CWE-862
Which versions are affected by CVE-2026-75836?
How do I fix CVE-2026-75836?
No fix has been published for CVE-2026-75836 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-75836 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-75836 exists.
Sources
Also known as GHSA-cx7m-jmr8-28mw.