CVE-2026-42609

Grav: Administrative Account Disruption and Privilege De-escalation via User Overwrite Logic

Published May 11, 2026 CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
Description
Grav is a file-based Web platform. Prior to 2.0.0-beta.2, a business logic vulnerability in the Grav Admin Panel allows a low-privileged user (with only user creation permissions) to overwrite existing accounts, including the primary administrator. By creating a new user with a username that already exists, the system updates the existing account's metadata and permissions instead of rejecting the request. This leads to a Denial of Service (DoS) on administrative functions and Privilege De-escalation of the root account. This vulnerability is fixed in 2.0.0-beta.2.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-rr73-568v-28f8 Grav Vulnerable to Administrative Account Disruption and Privilege De-escalation via User Overwrite Logic
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
CPEs cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:2.0.0:beta1:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Getgrav
Getgrav grav
Vendors & Products Getgrav
Getgrav grav
Type Values Removed Values Added
Description Grav is a file-based Web platform. Prior to 2.0.0-beta.2, a business logic vulnerability in the Grav Admin Panel allows a low-privileged user (with only user creation permissions) to overwrite existing accounts, including the primary administrator. By creating a new user with a username that already exists, the system updates the existing account's metadata and permissions instead of rejecting the request. This leads to a Denial of Service (DoS) on administrative functions and Privilege De-escalation of the root account. This vulnerability is fixed in 2.0.0-beta.2.
Title Grav: Administrative Account Disruption and Privilege De-escalation via User Overwrite Logic
Weaknesses CWE-269
CWE-285
CWE-639
CWE-837
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'}

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 14, 2026, 5:56 PM
Reserved
Apr 29, 2026, 12:31 AM
Status
Modified
Published
May 11, 2026, 4:17 PM
Modified
Oct 26, 2026, 6:10 PM