{"id":"CVE-2026-50279","summary":"Craft CMS: Authorship spoofing in `entries/save-entry` via pre-check/post-mutation authorization gap","details":"Craft CMS is a content management system (CMS). IN versions 5.0.0-RC1 and above prior to 5.9.21, theEntriesController::actionSaveEntry() performs entry-edit permission checks before request-controlled author changes are applied to the model, allowing for authorship spoofing. The subsequent author mutation path accepts attacker-supplied authors / author parameters and allows the change when the current user is one of the old authors. Because the controller does not re-run authorization after mutating the author list, a low-privileged user can reassign an entry’s authorship to another user without holding the dedicated peer-author-change permission. This issue has been fixed in version 5.9.21.","aliases":["GHSA-qq2c-2q8j-jh27"],"modified":"2026-07-15T01:48:52.971295953Z","published":"2026-07-01T23:31:31.101Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50279.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-285"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50279.json"},{"type":"ADVISORY","url":"https://github.com/craftcms/cms/security/advisories/GHSA-qq2c-2q8j-jh27"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50279"},{"type":"FIX","url":"https://github.com/craftcms/cms/commit/9cc493be8b414d7116c7f2bc2a6d0926e73f1248"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/craftcms/cms","events":[{"introduced":"04755d93f86d07cc183db47db8a0eee106892e30"},{"fixed":"9cc493be8b414d7116c7f2bc2a6d0926e73f1248"}],"database_specific":{"extracted_events":[{"introduced":"5.0.0-RC1"},{"fixed":"5.9.21"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50279.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}]}