Medium severity4.9NVD Advisory· Published Apr 21, 2026· Updated Apr 22, 2026

CVE-2026-26067

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 Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
october/systemPackagist	< 3.7.14	3.7.14
october/systemPackagist	>= 4.0.0, < 4.1.10	4.1.10

Affected products

ghsa-coords
pkg:composer/october/system
Range: < 3.7.14

Patches

Vulnerability mechanics

References

github.com/advisories/GHSA-3888-q23f-x7qhghsaADVISORY
nvd.nist.gov/vuln/detail/CVE-2026-26067ghsaADVISORY
github.com/octobercms/october/security/advisories/GHSA-3888-q23f-x7qhnvdWEB

News mentions

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