October: Safe Mode Bypass via Twig Database Write Operations
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| October CMS | october | 4.0.0 to before 4.1.10; before 3.7.14 | 4.1.10, 3.7.14 | Patch available | CNA |
| — | october/october (Packagist) | before 3.7.14 | 3.7.14 | Patch available | GHSA-h6jm-f4hh-fw27 |
| — | october/october (Packagist) | 4.0.0 to before 4.1.10 | 4.1.10 | Patch available | GHSA-h6jm-f4hh-fw27 |
- october VendorOctober CMS Affected 4.0.0 to before 4.1.10; before 3.7.14 Fixed in 4.1.10, 3.7.14 Patch available CNA
- october/october (Packagist) Vendor— Affected before 3.7.14 Fixed in 3.7.14 Patch available GHSA-h6jm-f4hh-fw27
- october/october (Packagist) Vendor— Affected 4.0.0 to before 4.1.10 Fixed in 4.1.10 Patch available GHSA-h6jm-f4hh-fw27
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:* | — | — | October CMS |
- cpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:* Versions — — ·October CMS
Remediation
- Fix · CNA october (octobercms) Fixed in 4.1.10, 3.7.14
- Fix · GHSA-h6jm-f4hh-fw27 october/october (Packagist) Fixed in 3.7.14 Advisory →
- Fix · GHSA-h6jm-f4hh-fw27 october/october (Packagist) Fixed in 4.1.10 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-26274
- 2026-10-03 Alias added: GHSA-h6jm-f4hh-fw27
References
More October CMS vulnerabilities
- TI-2021-12316 Account Takeover in Octobercms KEVCVSS 3.1CRITICAL 9.1
- TI-2021-12318 Arbitrary code execution in october/system CVSS 3.1HIGH 8.8
- TI-2017-14456 October CMS build 412 is vulnerable to PHP code execution in the file upload… CVSS 3.0HIGH 7.2
- TI-2023-23545 A Cross-Site Scripting (XSS) vulnerability in installation of October v.3.4.16 allows an… CVSS 3.1MEDIUM 5.4
- TI-2023-19223 An arbitrary file upload vulnerability in October CMS v3.4.4 allows attackers to execute… CVSS 3.1MEDIUM 5.4
- TI-2024-30847 October 3.6.30 allows an authenticated admin account to upload a PDF file containing… CVSS 3.1MEDIUM 4.7
Sources
- CVE-2026-26274 · CVE Program
- CVE-2026-26274 · NVD
- FIRST EPSS
- GHSA-h6jm-f4hh-fw27 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences