CVE-2026-26274Incomplete List of Disallowed Inputs in October

Severity
6.6MEDIUMNVD
EPSS
0.1%
top 78.94%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedApr 21

Description

October is a Content Management System (CMS) and web platform. Prior to 3.7.14 and 4.1.10, a vulnerability was identified in the Twig sandbox security policy that allowed database write operations when cms.safe_mode is enabled. Backend users with Developer permissions could use Twig template markup to execute insert, update, and delete operations on any database table through the query builder, which is included in the sandbox allow-list. This vulnerability is fixed in 3.7.14 and 4.1.10.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:HExploitability: 0.7 | Impact: 5.9

Affected Packages2 packages

Packagistoctober/october4.0.04.1.10+1
CVEListV5octobercms/october< 3.7.14+1

🔴Vulnerability Details

2
VulDB
October CMS up to 3.7.13/4.1.9 incomplete blacklist2026-04-21
GHSA
October CMS has Safe Mode Bypass via Twig Database Write Operations2026-04-21
CVE-2026-26274 — Incomplete List of Disallowed Inputs | cvebase