CVE-2026-26067: CWE-863: Incorrect Authorization in octobercms october
October is a Content Management System (CMS) and web platform. Prior to 3.7.14 and 4.1.10, a server-side information disclosure vulnerability was identified in the handling of CSS preprocessor files. Backend users with Editor permissions could craft .less, .sass, or .scss files that leverage the compiler's import functionality to read arbitrary files from the server. This worked even with cms.safe_mode enabled. This vulnerability is fixed in 3.7.14 and 4.1.10.
AI Analysis
Technical Summary
CVE-2026-26067 is an incorrect authorization vulnerability (CWE-863) in October CMS affecting versions before 3.7.14 and 4.1.10. It allows backend users with Editor permissions to craft CSS preprocessor files that abuse the import feature of the compiler to read arbitrary server files, bypassing cms.safe_mode protections. This leads to server-side information disclosure without requiring higher privileges or user interaction. The issue is resolved in October CMS versions 3.7.14 and 4.1.10.
Potential Impact
An attacker with Editor-level backend access can read arbitrary files on the server, potentially exposing sensitive information. This does not affect system integrity or availability but compromises confidentiality. The vulnerability is limited to authenticated users with Editor permissions and does not require UI interaction.
Mitigation Recommendations
Upgrade October CMS to version 3.7.14 or later, or 4.1.10 or later, where this vulnerability is fixed. No other mitigation is indicated or necessary as the fix addresses the authorization flaw directly.
CVE-2026-26067: CWE-863: Incorrect Authorization in octobercms october
Description
October is a Content Management System (CMS) and web platform. Prior to 3.7.14 and 4.1.10, a server-side information disclosure vulnerability was identified in the handling of CSS preprocessor files. Backend users with Editor permissions could craft .less, .sass, or .scss files that leverage the compiler's import functionality to read arbitrary files from the server. This worked even with cms.safe_mode enabled. This vulnerability is fixed in 3.7.14 and 4.1.10.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-26067 is an incorrect authorization vulnerability (CWE-863) in October CMS affecting versions before 3.7.14 and 4.1.10. It allows backend users with Editor permissions to craft CSS preprocessor files that abuse the import feature of the compiler to read arbitrary server files, bypassing cms.safe_mode protections. This leads to server-side information disclosure without requiring higher privileges or user interaction. The issue is resolved in October CMS versions 3.7.14 and 4.1.10.
Potential Impact
An attacker with Editor-level backend access can read arbitrary files on the server, potentially exposing sensitive information. This does not affect system integrity or availability but compromises confidentiality. The vulnerability is limited to authenticated users with Editor permissions and does not require UI interaction.
Mitigation Recommendations
Upgrade October CMS to version 3.7.14 or later, or 4.1.10 or later, where this vulnerability is fixed. No other mitigation is indicated or necessary as the fix addresses the authorization flaw directly.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-02-10T18:01:31.900Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e7a64f19fe3cd2cde569bc
Added to database: 4/21/2026, 4:31:11 PM
Last enriched: 4/21/2026, 4:47:06 PM
Last updated: 4/22/2026, 6:08:14 AM
Views: 6
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