---
id: CVE-2026-92589
title: >-
  Craft CMS 5.0.0 through 5.10.12 (fixed in 5.10.13) contains a broken access
  control flaw in the nested-elements reorder endpoint
summary: >-
  Craft CMS 5.0.0 through 5.10.12 (fixed in 5.10.13) contains a broken access
  control flaw in the nested-elements reorder endpoint. When an authenticated
  control panel user with viewEntries and viewPeerEntries (but without
  savePeerEntries)…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-862
vendor: craftcms
product: cms
affected:
  - cms >= 5.0.0 < 5.10.13
published: '2026-09-16'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T20:25:55.870'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92589'
references:
  - url: 'https://github.com/craftcms/cms/security/advisories/GHSA-6fp2-8j9w-7mj8'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/craft-cms-5.0.0-before-5.10.13-broken-access-control-via-nested-elements-reorder
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.00158
epssPercentile: 0.05363
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T20:11:47.295862Z'
ingestedAt: '2026-09-16T22:06:50.930Z'
---

## Overview

Craft CMS 5.0.0 through 5.10.12 (fixed in 5.10.13) contains a broken access control flaw in the nested-elements reorder endpoint. When an authenticated control panel user with viewEntries and viewPeerEntries (but without savePeerEntries) opens another author's entry in read-only mode, Craft unconditionally grants that session a `manageNestedElements::<ownerId>::field:<handle>` authorization flag for the entry's Matrix/Address fields. Unlike the corresponding delete endpoint, actions/nested-elements/reorder trusts this session flag alone and never rechecks the caller's save permission for the owner element. As a result, a view-only user can POST to actions/nested-elements/reorder using the ownerElementType, ownerId, ownerSiteId, attribute, elementIds, and offset parameters present in the read-only page source and rewrite the sort order of Matrix blocks or Addresses belonging to content they are explicitly denied save access to.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.