{"action":"Upgrade Umbraco.Cms to 16.5.1 (16.x) or 17.2.2 (17.x) or later.","affected":[{"fixed":"16.5.1","introduced":"15.3.1"},{"fixed":"17.2.2","introduced":"17.0.0"}],"component":"Umbraco.Cms","cve_ids":["CVE-2026-31834"],"ecosystem":"NuGet","epss":0.00355,"exploited":false,"fixed_versions":["16.5.1","17.2.2"],"ghsa_id":"GHSA-rhcg-3h8r-v6vp","id":"tcs_01M5N9065R279EWF11Z9KHYSV2","modified_at":"2026-03-13T08:11:22.505561Z","published_at":"2026-03-11T14:54:05Z","references":["https://osv.dev/vulnerability/GHSA-rhcg-3h8r-v6vp","https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-rhcg-3h8r-v6vp","https://nvd.nist.gov/vuln/detail/CVE-2026-31834","https://github.com/umbraco/Umbraco-CMS"],"severity":{"label":"high","score":7.2},"sources":[{"source":"osv","source_id":"GHSA-rhcg-3h8r-v6vp","url":"https://osv.dev/vulnerability/GHSA-rhcg-3h8r-v6vp"}],"summary":"Umbraco Affected by Vertical Privilege Escalation via Missing Authorization Checks"}