Critical severity · published May 11, 2026
CVE-2026-42613
Grav: Privilege Escalation via Missing Server-Side Validation of groups/access
9.4
CVSS
1.1%
EPSS
No
On KEV
Description
Grav is a file-based Web platform. Prior to 2.0.0-beta.2, the Login::register() method in the Login plugin accepts attacker-controlled groups and access fields from the registration POST data without server-side validation. When registration is enabled and groups or access are included in the configured allowed fields list, an unauthenticated user can self-register with admin.super privileges by injecting these fields into the registration request. This vulnerability is fixed in 2.0.0-beta.2.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 66% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
grav · getgrav
< 2.0.0-beta.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42613
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42613
github.com
https://github.com/getgrav/grav-plugin-login/commit/3d419a0dabd70aed1fd49afcd5919004a4141da1
github.com
https://github.com/getgrav/grav/security/advisories/GHSA-pxm6-mhxr-q4mj
github.com
https://github.com/getgrav/grav/security/advisories/GHSA-w48r-jppp-rcfw
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