{"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-2026-42051"],"ecosystem":"Packagist","epss":0.00193,"exploited":false,"fixed_versions":["4.9.0","5.4.0"],"ghsa_id":"GHSA-x68m-c7jf-2572","id":"tcs_01M5KFAR44J8BEPMRQ7FKH39RE","modified_at":"2026-05-13T13:56:29.293976Z","published_at":"2026-05-04T19:59:30Z","references":["https://osv.dev/vulnerability/GHSA-x68m-c7jf-2572","https://github.com/getkirby/kirby/security/advisories/GHSA-x68m-c7jf-2572","https://nvd.nist.gov/vuln/detail/CVE-2026-42051","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"},"sources":[{"source":"osv","source_id":"GHSA-x68m-c7jf-2572","url":"https://osv.dev/vulnerability/GHSA-x68m-c7jf-2572"}],"summary":"Kirby CMS's system API endpoint leaks installed version and license data to authenticated users"}