CVE-2026-42609
Grav: Administrative Account Disruption and Privilege De-escalation via User Overwrite Logic
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-269 CWE-285 CWE-639 CWE-837 |
| Vendor | getgrav |
| Product | grav |
| Published | May 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High
Affected Versions
getgrav / grav
< 2.0.0-beta.2
References
github.com: https://github.com/getgrav/grav/security/advisories/GHSA-rr73-568v-28f8 github.com: https://github.com/getgrav/grav/commit/5a12f9be8314682c8713e569e330f11805d0a663 github.com: https://github.com/getgrav/grav/commit/c66dfeb5ff679a1667678c6335eb9ff3255dfc47 github.com: https://github.com/getgrav/grav/commit/d904efc33e03ebb597afde8d3368b28cf0423632