{"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":0.05374,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-18T20:11:47.295862Z"},"ingestedAt":"2026-09-16T22:06:50.930Z","slug":"CVE-2026-92589","body":"## Overview\n\nCraft 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}