CVE-2026-75837: Grav before 2.0.14 Privilege Escalation via Group Access Field

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-18 · updated 2026-10-22
Weakness: CWE-269

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.

Affected products

getgrav grav: before 2.0.14 — fixed in 2.0.14

How to fix

Upgrade to a fixed version: getgrav grav 2.0.14. Check the vendor advisory for mitigations.

References

https://github.com/getgrav/grav/security/advisories/GHSA-xhfv-7758-r9hx
https://www.vulncheck.com/advisories/grav-before-privilege-escalation-via-group-access-field
https://github.com/getgrav/grav/security/advisories/GHSA-xhfv-7758-r9hx

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