CVE-2026-26067
Medium
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.
SeverityMedium
CVSS4.9
Exploit probability—
ProductOctober/system
PublishedApr 21, 2026
First seenApr 21, 2026
Weakness typeCWE-863Incorrect authorizationCWE-184CWE-184
How to fix
Update
- october/system3.7.14, 4.1.10 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| october/systemPackagist | v < 3.7.14, 4.0.0 ≤ v < 4.1.10 | 3.7.14, 4.1.10 |
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