Craft CMS CVE-2026-41128

MEDIUM
Missing Authorization (CWE-862)
2026-04-22 [email protected]
Authentication Bypass
5.3
CVSS 4.0
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CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/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:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
Apr 22, 2026 - 00:58 vuln.today

DescriptionNVD

Craft CMS is a content management system (CMS). In versions 5.6.0 through 5.9.14, the actionSavePermissions() endpoint allows a user with only viewUsers permission to remove arbitrary users from all user groups. While _saveUserGroups() enforces per-group authorization for additions, it performs no equivalent authorization check for removals, so submitting an empty groups value removes all existing group memberships. Version 5.9.15 contains a patch.

AnalysisAI

Craft CMS versions 5.6.0 through 5.9.14 allow authenticated users with only viewUsers permission to remove arbitrary users from all user groups via the actionSavePermissions() endpoint, bypassing per-group authorization controls that protect group additions. An attacker can submit an empty groups value to strip all group memberships from any user, degrading access control integrity. …

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CVE-2026-41128 vulnerability details – vuln.today
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