CVE-2026-29179: CWE-863: Incorrect Authorization in octobercms october
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.
AI Analysis
Technical Summary
CVE-2026-29179 is an incorrect authorization vulnerability (CWE-863) in October CMS affecting versions before 3.7.16 and 4.1.16. The vulnerability arises from missing fine-grained sub-permission checks in the CMS and Tailor editor extensions, allowing backend users with editor access but without specific sub-permissions (editor.cms_assets or editor.tailor_blueprints) to perform file operations such as create, delete, rename, move, and upload on theme assets or blueprint files. An operator precedence error also caused disclosure of the theme blueprint directory tree under the same permission conditions. The vulnerability is fixed in versions 3.7.16 and 4.1.16.
Potential Impact
The impact is limited to backend users who have editor access but are explicitly denied certain sub-permissions, an uncommon configuration. These users could perform unauthorized file operations on theme assets and blueprint files, potentially leading to unauthorized modification or disclosure of theme-related files. The CVSS score is 3.3 (low severity), indicating limited impact with required high privileges and no user interaction.
Mitigation Recommendations
A fix is available in October CMS versions 3.7.16 and 4.1.16. Users should upgrade to these or later versions to remediate the vulnerability. Since this is a software vulnerability, patching is the recommended mitigation. No vendor advisory content is provided to indicate alternative mitigations or that no action is required.
CVE-2026-29179: CWE-863: Incorrect Authorization in octobercms october
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-29179 is an incorrect authorization vulnerability (CWE-863) in October CMS affecting versions before 3.7.16 and 4.1.16. The vulnerability arises from missing fine-grained sub-permission checks in the CMS and Tailor editor extensions, allowing backend users with editor access but without specific sub-permissions (editor.cms_assets or editor.tailor_blueprints) to perform file operations such as create, delete, rename, move, and upload on theme assets or blueprint files. An operator precedence error also caused disclosure of the theme blueprint directory tree under the same permission conditions. The vulnerability is fixed in versions 3.7.16 and 4.1.16.
Potential Impact
The impact is limited to backend users who have editor access but are explicitly denied certain sub-permissions, an uncommon configuration. These users could perform unauthorized file operations on theme assets and blueprint files, potentially leading to unauthorized modification or disclosure of theme-related files. The CVSS score is 3.3 (low severity), indicating limited impact with required high privileges and no user interaction.
Mitigation Recommendations
A fix is available in October CMS versions 3.7.16 and 4.1.16. Users should upgrade to these or later versions to remediate the vulnerability. Since this is a software vulnerability, patching is the recommended mitigation. No vendor advisory content is provided to indicate alternative mitigations or that no action is required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-04T14:44:00.713Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e7a64f19fe3cd2cde569c5
Added to database: 4/21/2026, 4:31:11 PM
Last enriched: 4/21/2026, 4:46:45 PM
Last updated: 4/22/2026, 7:19:26 AM
Views: 11
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