Vulnerability-Lookup

CVE-2026-29179 (GCVE-0-2026-29179)

Vulnerability from cvelistv5 – Published: 2026-04-21 16:19 – Updated: 2026-04-21 16:46

Title

October: Editor Sub-Permission Bypass for Asset and Blueprint File Operations

Summary

October is a Content Management System (CMS) and web platform. Prior to 3.7.16 and 4.1.16, fine-grained sub-permission checks for asset and blueprint file operations were not enforced in the CMS and Tailor editor extensions. This only affects backend users who were explicitly granted editor access but had editor.cms_assets or editor.tailor_blueprints specifically withheld, an uncommon permission configuration. In this edge case, such users could perform file operations (create, delete, rename, move, upload) on theme assets or blueprint files despite lacking the required sub-permission. A related operator precedence error in the Tailor navigation also disclosed the theme blueprint directory tree under the same conditions. This vulnerability is fixed in 3.7.16 and 4.1.16.

Severity

3.3 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-21 16:46 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7876 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/octobercms/october/security/ad…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
octobercms	october	Affected: >= 4.0.0, < 4.1.16 Affected: < 3.7.16	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-29179

Vulnerability from fkie_nvd - Published: 2026-04-21 17:16 - Updated: 2026-10-26 21:10

Severity

3.3 (Low) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/octobercms/october/security/advisories/GHSA-jvwg-phxx-j3rp

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "october",
          "vendor": "octobercms",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.0.0, \u003c 4.1.16"
            },
            {
              "status": "affected",
              "version": "\u003c 3.7.16"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
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    },
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    }
  ],
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GHSA-JVWG-PHXX-J3RP

Vulnerability from github – Published: 2026-04-21 17:15 – Updated: 2026-04-24 21:06

Summary

October CMS: Editor Sub-Permission Bypass for Asset and Blueprint File Operations

Details

Fine-grained sub-permission checks for asset and blueprint file operations were not enforced in the CMS and Tailor editor extensions. This only affects backend users who were explicitly granted editor access but had editor.cms_assets or editor.tailor_blueprints specifically withheld, an uncommon permission configuration. In this edge case, such users could perform file operations (create, delete, rename, move, upload) on theme assets or blueprint files despite lacking the required sub-permission. A related operator precedence error in the Tailor navigation also disclosed the theme blueprint directory tree under the same conditions.

Impact

Only exploitable by authenticated backend users with editor access who have been specifically denied the editor.cms_assets or editor.tailor_blueprints sub-permissions
Does not affect default permission configurations where editor users typically have all sub-permissions granted
Users without editor.cms_assets could manipulate theme asset files (delete, rename, move, upload, create directories)
Users without editor.tailor_blueprints could manipulate blueprint files (delete, rename, move, upload, create directories)
Users without editor.tailor_blueprints could view the theme blueprint navigation tree, disclosing file paths and directory structure

Patches

The vulnerability has been patched in v3.7.16 and v4.1.16. Fine-grained document type permission checks are now enforced on all asset and blueprint file operation commands, and the navigation node condition logic has been corrected. All users are encouraged to upgrade to the latest patched version.

Workarounds

Restrict the editor permission to fully trusted administrators only
Remove the editor permission from any user who should not have asset or blueprint management access

Severity

3.3 (Low)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "october/system"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0"
            },
            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "october/system"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.7.16"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-29179"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-21T17:15:38Z",
    "nvd_published_at": "2026-04-21T17:16:36Z",
    "severity": "LOW"
  },
  "details": "Fine-grained sub-permission checks for asset and blueprint file operations were not enforced in the CMS and Tailor editor extensions. This only affects backend users who were explicitly granted `editor` access but had `editor.cms_assets` or `editor.tailor_blueprints` specifically withheld, an uncommon permission configuration. In this edge case, such users could perform file operations (create, delete, rename, move, upload) on theme assets or blueprint files despite lacking the required sub-permission. A related operator precedence error in the Tailor navigation also disclosed the theme blueprint directory tree under the same conditions.\n\n### Impact\n- Only exploitable by authenticated backend users with `editor` access who have been specifically denied the `editor.cms_assets` or `editor.tailor_blueprints` sub-permissions\n- Does not affect default permission configurations where editor users typically have all sub-permissions granted\n- Users without `editor.cms_assets` could manipulate theme asset files (delete, rename, move, upload, create directories)\n- Users without `editor.tailor_blueprints` could manipulate blueprint files (delete, rename, move, upload, create directories)\n- Users without `editor.tailor_blueprints` could view the theme blueprint navigation tree, disclosing file paths and directory structure\n\n### Patches\nThe vulnerability has been patched in v3.7.16 and v4.1.16. Fine-grained document type permission checks are now enforced on all asset and blueprint file operation commands, and the navigation node condition logic has been corrected. All users are encouraged to upgrade to the latest patched version.\n\n### Workarounds\n- Restrict the `editor` permission to fully trusted administrators only\n- Remove the `editor` permission from any user who should not have asset or blueprint management access",
  "id": "GHSA-jvwg-phxx-j3rp",
  "modified": "2026-04-24T21:06:39Z",
  "published": "2026-04-21T17:15:38Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/octobercms/october/security/advisories/GHSA-jvwg-phxx-j3rp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-29179"
    },
    {
      "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:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "October CMS: Editor Sub-Permission Bypass for Asset and Blueprint File Operations"
}

Sightings

Author	Source	Type	Date	Other

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-29179 (GCVE-0-2026-29179)

FKIE_CVE-2026-29179

GHSA-JVWG-PHXX-J3RP

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