Vulnerability-Lookup

CVE-2026-26274 (GCVE-0-2026-26274)

Vulnerability from cvelistv5 – Published: 2026-04-21 16:16 – Updated: 2026-04-21 19:16

Title

October: Safe Mode Bypass via Twig Database Write Operations

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.

Severity ?

6.6 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-184 - Incomplete List of Disallowed Inputs
CWE-863 - Incorrect Authorization

Assigner

GitHub_M

References

URL

Tags

https://github.com/octobercms/october/security/ad…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	octobercms	october	Affected: >= 4.0.0, < 4.1.10 Affected: < 3.7.14

Show details on NVD website

JSON

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GHSA-H6JM-F4HH-FW27

Vulnerability from github – Published: 2026-04-21 16:44 – Updated: 2026-04-21 16:44

Summary

October CMS has Safe Mode Bypass via Twig Database Write Operations

Details

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.

Impact

Arbitrary database writes including modification or deletion of any table
Requires authenticated backend access with Developer permissions
Only relevant when cms.safe_mode is enabled (otherwise direct PHP injection is already possible)

Patches

The vulnerability has been patched in v3.7.14 and v4.1.10. Write operations such as insert, update, delete, and truncate are now blocked on query builder and model objects within the Twig sandbox. All users are encouraged to upgrade to the latest patched version.

Workarounds

If upgrading immediately is not possible: - Restrict Developer tool access to fully trusted administrators only

Reporter

Reported by Chris Alupului

Severity ?

6.6 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "october/october"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.7.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "october/october"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0"
            },
            {
              "fixed": "4.1.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-26274"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-184",
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-21T16:44:19Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "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.\n\n### Impact\n- Arbitrary database writes including modification or deletion of any table\n- Requires authenticated backend access with Developer permissions\n- Only relevant when `cms.safe_mode` is enabled (otherwise direct PHP injection is already possible)\n\n### Patches\nThe vulnerability has been patched in v3.7.14 and v4.1.10. Write operations such as `insert`, `update`, `delete`, and `truncate` are now blocked on query builder and model objects within the Twig sandbox. All users are encouraged to upgrade to the latest patched version.\n\n### Workarounds\nIf upgrading immediately is not possible:\n- Restrict Developer tool access to fully trusted administrators only\n\n### Reporter\n- Reported by [Chris Alupului](https://github.com/neosprings)",
  "id": "GHSA-h6jm-f4hh-fw27",
  "modified": "2026-04-21T16:44:19Z",
  "published": "2026-04-21T16:44:19Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/octobercms/october/security/advisories/GHSA-h6jm-f4hh-fw27"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/octobercms/october"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "October CMS has Safe Mode Bypass via Twig Database Write Operations"
}

FKIE_CVE-2026-26274

Vulnerability from fkie_nvd - Published: 2026-04-21 17:16 - Updated: 2026-04-22 21:08

Severity ?

6.6 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Summary

References

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

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
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    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-26274",
  "lastModified": "2026-04-22T21:08:48.550",
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-26274 (GCVE-0-2026-26274)

GHSA-H6JM-F4HH-FW27

Impact

Patches

Workarounds

Reporter

FKIE_CVE-2026-26274

Tags

Sightings

Nomenclature