Critical severity · published Sep 2, 2026
CVE-2026-84795
Craft CMS before 5.10.11 Authentication Bypass via Admin Flag Inheritance
9.8
CVSS
0.5%
EPSS
No
On KEV
Description
Craft CMS before 5.10.11 fails to validate the admin flag during user registration, allowing it to persist from deactivated admin accounts. Attackers can register with a deactivated admin's email address to inherit administrator privileges when public registration and disabled email verification are configured.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
cms · craftcms
5.0.0-RC1 before 5.10.11 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84795
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84795
github.com
https://github.com/craftcms/cms/security/advisories/GHSA-242m-9wq7-vhwq
www.vulncheck.com
https://www.vulncheck.com/advisories/craft-cms-before-5.10.11-authentication-bypass-via-admin-flag-inheritance
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