October is a Content Management System (CMS) and web platform. Prior to 3.7.16 and 4.1.16, fine-grained sub-permission checks for asset and blueprint file operations were not enforced in the CMS and Tailor editor extensions. This only affects backend users who were explicitly granted editor access but had editor.cms_assets or editor.tailor_blueprints specifically withheld, an uncommon permission configuration. In this edge case, such users could perform file operations (create, delete, rename, move, upload) on theme assets or blueprint files despite lacking the required sub-permission. A related operator precedence error in the Tailor navigation also disclosed the theme blueprint directory tree under the same conditions. This vulnerability is fixed in 3.7.16 and 4.1.16.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-jvwg-phxx-j3rp October CMS: Editor Sub-Permission Bypass for Asset and Blueprint File Operations
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 21 Apr 2026 17:45:00 +0000

Type Values Removed Values Added
First Time appeared Octobercms
Octobercms october
Vendors & Products Octobercms
Octobercms october

Tue, 21 Apr 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 21 Apr 2026 16:30:00 +0000

Type Values Removed Values Added
Description October is a Content Management System (CMS) and web platform. Prior to 3.7.16 and 4.1.16, fine-grained sub-permission checks for asset and blueprint file operations were not enforced in the CMS and Tailor editor extensions. This only affects backend users who were explicitly granted editor access but had editor.cms_assets or editor.tailor_blueprints specifically withheld, an uncommon permission configuration. In this edge case, such users could perform file operations (create, delete, rename, move, upload) on theme assets or blueprint files despite lacking the required sub-permission. A related operator precedence error in the Tailor navigation also disclosed the theme blueprint directory tree under the same conditions. This vulnerability is fixed in 3.7.16 and 4.1.16.
Title October: Editor Sub-Permission Bypass for Asset and Blueprint File Operations
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 3.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-04-21T16:46:47.873Z

Reserved: 2026-03-04T14:44:00.713Z

Link: CVE-2026-29179

cve-icon Vulnrichment

Updated: 2026-04-21T16:46:44.504Z

cve-icon NVD

Status : Received

Published: 2026-04-21T17:16:36.053

Modified: 2026-04-21T17:16:36.053

Link: CVE-2026-29179

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-21T17:30:37Z

Weaknesses