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CVE-2026-41128

CVE-2026-41128 · Craft CMS has a Missing Authorization Check on User Group Removal via save-permissions Action

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 5.3 · Medium · EPSS 0.2% · Fix available

Published
Updated

Stack: php

Affected products and versions

  • cms

    Versions
    • >= 5.6.0, < 5.9.15: Affected

    No fix published

  • craftcms/cms Packagist

    Versions
    • 5.6.0
    • 5.6.0.1
    • 5.6.0.2
    • 5.6.1
    • 5.6.10
    • 5.6.10.1
    • 5.6.10.2
    • 5.6.11
    • 5.6.12
    • 5.6.13
    • 5.6.14
    • 5.6.15
    • 5.6.16
    • 5.6.17
    • 5.6.2
    • 5.6.3
    • 5.6.4
    • 5.6.5
    • 5.6.5.1
    • 5.6.6
    • 5.6.7
    • 5.6.8
    • 5.6.9
    • 5.6.9.1
    • 5.7.0
    • 5.7.0-beta.1
    • 5.7.0-beta.2
    • 5.7.1
    • 5.7.1.1
    • 5.7.10
    • 5.7.11
    • 5.7.2
    • 5.7.3
    • 5.7.4
    • 5.7.5
    • 5.7.6
    • 5.7.7
    • 5.7.8
    • 5.7.8.1
    • 5.7.8.2
    • 5.7.9
    • 5.8.0
    • 5.8.1
    • 5.8.10
    • 5.8.11
    • 5.8.12
    • 5.8.13
    • 5.8.13.1
    • 5.8.13.2
    • 5.8.14
    • 5.8.15
    • 5.8.16
    • 5.8.17
    • 5.8.18
    • 5.8.19
    • 5.8.2
    • 5.8.20
    • 5.8.21
    • 5.8.22
    • 5.8.23
    • 5.8.3
    • 5.8.4
    • 5.8.5
    • 5.8.6
    • 5.8.7
    • 5.8.8
    • 5.8.9
    • 5.9.0
    • 5.9.0-beta.1
    • 5.9.0-beta.2
    • 5.9.1
    • 5.9.10
    • 5.9.11
    • 5.9.12
    • 5.9.13
    • 5.9.14
    • 5.9.2
    • 5.9.3
    • 5.9.4
    • 5.9.5
    • 5.9.6
    • 5.9.7
    • 5.9.8
    • 5.9.9
    Affected ranges
    • ECOSYSTEM: ≥ 5.6.0, < 5.9.15

    Update to 5.9.15

Original sources

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