CVE-2026-75837 Grav before 2.0.14 Privilege Escalation via Group Access Field
A delegated admin can escalate to super-admin by modifying group access fields, enabling arbitrary code execution via Twig.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-75837?
CVE-2026-75837 is a critical vulnerability in getgrav grav, published on 18 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Grav before 2.0.14 fails to guard the access field in the core group blueprint with the required security@: admin.super restriction. A delegated admin.users operator can save a group with access[admin][super]=true to escalate to super-admin, gaining scheduler and Twig evaluation capabilities.
Weakness: CWE-269
Which versions are affected by CVE-2026-75837?
2 open source packages ship an affected version, including getgrav/grav.
| Package | Affected | Fixed in |
|---|---|---|
getgrav/grav Packagist | All versions | 2.0.14 |
getgrav/grav Packagist | All versions | 2.0.14 |
How do I fix CVE-2026-75837?
Upgrade getgrav/grav to 2.0.14 or later.
Is CVE-2026-75837 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-75837 exists.
Sources
Also known as GHSA-xhfv-7758-r9hx.