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CVE-2026-26274

October: Safe Mode Bypass via Twig Database Write Operations

Published: Apr 21, 2026Updated: Apr 22, 2026 Sources: CVE List NVDCWE-184
NVD MITRE
6.6CVSSMEDIUM
EPSS Score
0.2%
Top 86.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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 Breakdown

AV:NAC:HPR:HUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-184CWE-863

Affected Products

octoberoctobercms
On-premWeb App
Web & CMS Plugins / cms-core
octobercmsoss-projectWeb & CMS Pluginsaka ckeditor4, ckeditor5

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/octobercms/october/security/advisories/GHSA-h6jm-f4hh-fw27
github.com

Timeline

Published
Apr 21, 2026
Last Updated
Apr 22, 2026

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