{"id":"CVE-2026-92589","summary":"Craft CMS 5.0.0 before 5.10.13 Broken Access Control via nested-elements/reorder","details":"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::\u003cownerId\u003e::field:\u003chandle\u003e` 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.","aliases":["GHSA-6fp2-8j9w-7mj8"],"modified":"2026-09-18T03:48:47.098762467Z","published":"2026-09-16T21:46:55.216Z","database_specific":{"cwe_ids":["CWE-862"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92589.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92589.json"},{"type":"ADVISORY","url":"https://github.com/craftcms/cms/security/advisories/GHSA-6fp2-8j9w-7mj8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92589"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/craft-cms-5.0.0-before-5.10.13-broken-access-control-via-nested-elements-reorder"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/craftcms/cms","events":[{"introduced":"f6a8fb685d44e387435825e3a96809eeda4973a6"},{"fixed":"0b18123e8c3be1edcf6f785e9925e1b1007ce8c5"}],"database_specific":{"extracted_events":[{"introduced":"5.0.0"},{"fixed":"5.10.13"},{"fixed":"5.10.12"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92589.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}]}