CVE-2026-26067
CVE-2026-26067 · October: Safe Mode Bypass via CSS Preprocessor Compilers
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 4.9 · Medium · EPSS 0.2% · Fix available
- Published
- Updated
Stack: php
Affected products and versions
october
- Versions
- >= 4.0.0, < 4.1.10: Affected
- < 3.7.14: Affected
No fix published
october/system Packagist
- Versions
- v1.0.319
- v1.0.320
- v1.0.321
- v1.0.322
- v1.0.323
- v1.0.324
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- v1.0.475
- v1.0.476
- v1.1.0
- v1.1.1
- v1.1.10
- v1.1.11
- v1.1.12
- v1.1.2
- v1.1.3
- v1.1.4
- v1.1.5
- v1.1.6
- v1.1.9
- Affected ranges
- ECOSYSTEM: < 3.7.14
Update to 3.7.14
october/system Packagist
- Affected ranges
- ECOSYSTEM: ≥ 4.0.0, < 4.1.10
Update to 4.1.10