{"action":"Upgrade getkirby/cms to 4.9.0 or later.","affected":[{"fixed":"4.9.0","introduced":"0"},{"fixed":"5.4.0","introduced":"5.0.0"}],"component":"getkirby/cms","cve_ids":["CVE-2026-42137"],"ecosystem":"Packagist","epss":0.00303,"exploited":false,"fixed_versions":["4.9.0","5.4.0"],"ghsa_id":"GHSA-85x2-r8xv-ww8c","id":"tcs_01M5KEYPF3NMGHFJQ7R6XVH7V6","modified_at":"2026-05-05T16:11:44.994600Z","published_at":"2026-04-30T21:03:20Z","references":["https://osv.dev/vulnerability/GHSA-85x2-r8xv-ww8c","https://github.com/getkirby/kirby/security/advisories/GHSA-85x2-r8xv-ww8c","https://github.com/getkirby/kirby","https://github.com/getkirby/kirby/releases/tag/4.9.0","https://github.com/getkirby/kirby/releases/tag/5.4.0"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"GHSA-85x2-r8xv-ww8c","url":"https://osv.dev/vulnerability/GHSA-85x2-r8xv-ww8c"},{"source":"nvd","source_id":"CVE-2026-42137","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42137"}],"summary":"Kirby CMS's `pages.access/list` and `files.access/list` permissions are not consistently checked in the Panel and REST API"}