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CVE PROGRAM SOURCE RECORD4.9 Medium

CVE-2026-26067

October: Safe Mode Bypass via CSS Preprocessor Compilers

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

octobercms october

  • >= 4.0.0, < 4.1.10affected
  • < 3.7.14affected

References