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Vulnerability record · CVE-2026-75837 · published 18 August 2026

CVE-2026-75837: Improper privilege management vulnerability

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.

9.3 CVSS 4.0 Critical EPSS 0.49% · top 60.0% CWE-269 · Improper privilege management Deferred
9.3CVSS 4.0 base score
0.49%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
8 Sep 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
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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Source: NIST National Vulnerability Database (record CVE-2026-75837), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.